Year AMO Year PDO Year HMO Year HMO approx 1880 0.043016297 1880 0.070477354 1880 0.049693687 1880 0.043145285 1881 0.050893619 1881 0.079616558 1881 0.053706996 1881 0.049709819 1882 0.058252876 1882 0.087685229 1882 0.057120739 1882 0.055674103 1883 0.064870731 1883 0.09452043 1883 0.059836176 1883 0.060886544 1884 0.070539026 1884 0.099979006 1884 0.061762097 1884 0.065208977 1885 0.075068367 1885 0.103940049 1885 0.062816789 1885 0.068519045 1886 0.078291376 1886 0.106306933 1886 0.062929878 1886 0.070712286 1887 0.080065577 1887 0.107008864 1887 0.062044008 1887 0.071703892 1888 0.080275842 1888 0.106001946 1888 0.060116319 1888 0.071430109 1889 0.078836364 1889 0.103269737 1889 0.057119701 1889 0.069849265 1890 0.075692139 1890 0.098823283 1890 0.053043774 1890 0.066942394 1891 0.070819902 1891 0.092700669 1891 0.047895591 1891 0.062713467 1892 0.064228533 1892 0.084966066 1892 0.041700028 1892 0.057189222 1893 0.055958906 1893 0.075708331 1893 0.034499859 1893 0.050418594 1894 0.046083201 1894 0.06503919 1894 0.026355508 1894 0.042471778 1895 0.034703686 1895 0.053091036 1895 0.017344465 1895 0.033438933 1896 0.021950987 1896 0.040014413 1896 0.007560394 1896 0.023428553 1897 0.0079819 1897 0.025975232 1897 -0.002888073 1897 0.012565559 1898 -0.007023244 1898 0.011151772 1898 -0.013878826 1898 0.000989124 1899 -0.022863583 1899 -0.004268445 1899 -0.025278034 1899 -0.011149702 1900 -0.039321066 1900 -0.020091864 1900 -0.036942129 1900 -0.023690542 1901 -0.056164062 1901 -0.03612212 1901 -0.048719986 1901 -0.036466342 1902 -0.073151168 1902 -0.052163205 1902 -0.06045527 1902 -0.049306106 1903 -0.090035162 1903 -0.068022518 1903 -0.071988885 1903 -0.062037637 1904 -0.106567022 1904 -0.083513761 1904 -0.083161502 1904 -0.074490246 1905 -0.122499944 1905 -0.098459602 1905 -0.093816107 1905 -0.086497389 1906 -0.137593292 1906 -0.112694085 1906 -0.103800524 1906 -0.097899178 1907 -0.151616417 1907 -0.126064739 1907 -0.112969876 1907 -0.108544728 1908 -0.164352278 1908 -0.138434356 1908 -0.121188923 1908 -0.118294304 1909 -0.175600802 1909 -0.149682433 1909 -0.128334247 1909 -0.127021244 1910 -0.185181945 1910 -0.159706238 1910 -0.134296242 1910 -0.134613613 1911 -0.192938392 1911 -0.168421531 1911 -0.138980876 1911 -0.14097559 1912 -0.198737867 1912 -0.175762914 1912 -0.142311185 1912 -0.146028555 1913 -0.202475013 1913 -0.181683845 1913 -0.144228486 1913 -0.14971188 1914 -0.204072822 1914 -0.186156327 1914 -0.144693286 1914 -0.151983413 1915 -0.203483609 1915 -0.189170294 1915 -0.143685871 1915 -0.152819659 1916 -0.200689499 1916 -0.190732737 1916 -0.14120657 1916 -0.152215676 1917 -0.195702454 1917 -0.190866596 1917 -0.137275693 1917 -0.150184687 1918 -0.188563837 1918 -0.189609471 1918 -0.13193315 1918 -0.146757432 1919 -0.179343534 1919 -0.187012172 1919 -0.125237764 1919 -0.141981283 1920 -0.168138647 1920 -0.18313718 1920 -0.117266289 1920 -0.135919149 1921 -0.155071817 1921 -0.178057034 1921 -0.108112159 1921 -0.128648196 1922 -0.140289182 1922 -0.171852703 1922 -0.097884 1922 -0.120258412 1923 -0.123958033 1923 -0.164611975 1923 -0.086703924 1923 -0.11085105 1924 -0.106264208 1924 -0.156427901 1924 -0.074705649 1924 -0.100536985 1925 -0.087409275 1925 -0.147397322 1925 -0.062032472 1925 -0.08943501 1926 -0.067607546 1926 -0.137619504 1926 -0.048835149 1926 -0.077670101 1927 -0.04708299 1927 -0.127194912 1927 -0.035269688 1927 -0.065371691 1928 -0.026066082 1928 -0.116224124 1928 -0.021495137 1928 -0.052671965 1929 -0.004790648 1929 -0.104806897 1929 -0.007671359 1929 -0.03970421 1930 0.016509248 1930 -0.093041399 1930 0.006043135 1930 -0.026601244 1931 0.037602333 1931 -0.08102359 1931 0.019493284 1931 -0.013493926 1932 0.058263016 1932 -0.068846746 1932 0.032529466 1932 -0.000509784 1933 0.078274117 1933 -0.056601125 1933 0.045009355 1933 0.012228243 1934 0.097429393 1934 -0.044373736 1934 0.056799619 1934 0.024602941 1935 0.115535823 1935 -0.032248215 1935 0.067777445 1935 0.036503823 1936 0.132415655 1936 -0.020304763 1936 0.077831875 1936 0.047827996 1937 0.147908165 1937 -0.008620133 1937 0.086864933 1937 0.058480905 1938 0.161871139 1938 0.002732357 1938 0.094792556 1938 0.068376946 1939 0.174182065 1939 0.013682822 1939 0.101545304 1939 0.077439959 1940 0.184739019 1940 0.024164829 1940 0.107068866 1940 0.085603606 1941 0.193461279 1941 0.034115465 1941 0.11132436 1941 0.092811652 1942 0.200289632 1942 0.043475467 1942 0.114288432 1942 0.099018141 1943 0.205186428 1943 0.052189436 1943 0.115953168 1943 0.104187488 1944 0.208135362 1944 0.060206127 1944 0.116325837 1944 0.108294504 1945 0.209141018 1945 0.067478846 1945 0.115428454 1945 0.111324336 1946 0.208228191 1946 0.073965915 1946 0.113297213 1946 0.113272363 1947 0.205441007 1947 0.079631239 1947 0.109981773 1947 0.114144023 1948 0.200841862 1948 0.084444934 1948 0.105544434 1948 0.1139546 1949 0.194510208 1949 0.088384003 1949 0.100059202 1949 0.112728964 1950 0.186541199 1950 0.091433058 1950 0.093610771 1950 0.110501257 1951 0.177044228 1951 0.093585034 1951 0.086293429 1951 0.10731455 1952 0.166141379 1952 0.094841892 1952 0.078209896 1952 0.103220441 1953 0.153965807 1953 0.095215257 1953 0.069470118 1953 0.098278615 1954 0.140660063 1954 0.094726987 1954 0.060190013 1954 0.092556343 1955 0.126374403 1955 0.093409607 1955 0.050490195 1955 0.086127943 1956 0.111265069 1956 0.091306611 1956 0.040494661 1956 0.079074162 1957 0.095492588 1957 0.088472575 1957 0.030329481 1957 0.07148151 1958 0.079220072 1958 0.084973072 1958 0.020121457 1958 0.063441528 1959 0.062611563 1959 0.080884365 1959 0.009996803 1959 0.055049975 1960 0.045830415 1960 0.076292852 1960 7.98096E-05 1960 0.046405966 1961 0.029037722 1961 0.07129426 1961 -0.009508468 1961 0.03761102 1962 0.012390823 1962 0.065992593 1962 -0.018651508 1962 0.028768064 1963 -0.003958131 1963 0.060498811 1963 -0.027238599 1963 0.019980356 1964 -0.019863529 1964 0.054929279 1964 -0.035166074 1964 0.01135037 1965 -0.035187557 1965 0.049403987 1965 -0.042338509 1965 0.002978631 1966 -0.049801364 1966 0.044044569 1966 -0.048669861 1966 -0.005037484 1967 -0.063586127 1967 0.038972158 1967 -0.054084548 1967 -0.012604958 1968 -0.076434 1968 0.034305108 1968 -0.058518441 1968 -0.019636347 1969 -0.088248952 1969 0.030156635 1969 -0.061919771 1969 -0.026050977 1970 -0.09894748 1970 0.02663242 1970 -0.064249922 1970 -0.031776102 1971 -0.108459199 1971 0.023828231 1971 -0.065484113 1971 -0.036748004 1972 -0.116727292 1972 0.021827611 1972 -0.06561193 1972 -0.040913007 1973 -0.12370883 1973 0.020699698 1973 -0.064637716 1973 -0.044228396 1974 -0.129374946 1974 0.020497227 1974 -0.062580793 1974 -0.046663209 1975 -0.133710872 1975 0.021254763 1975 -0.059475501 1975 -0.048198882 1976 -0.136715828 1976 0.022987226 1976 -0.055371055 1976 -0.048829734 1977 -0.138402765 1977 0.02568874 1977 -0.050331198 1977 -0.048563273 1978 -0.138797973 1978 0.029331859 1978 -0.044433654 1978 -0.04742031 1979 -0.137940538 1979 0.033867191 1979 -0.037769367 1979 -0.045434871 1980 -0.135881676 1980 0.03922345 1980 -0.030441539 1980 -0.042653894 1981 -0.132683928 1981 0.045307951 1981 -0.022564461 1981 -0.039136722 1982 -0.128420245 1982 0.052007547 1982 -0.014262153 1982 -0.034954383 1983 -0.123172953 1983 0.059190013 1983 -0.005666813 1983 -0.03018866 1984 -0.117032629 1984 0.066705856 1984 0.003082892 1984 -0.024930976 1985 -0.110096889 1985 0.074390521 1985 0.011843683 1985 -0.019281092 1986 -0.102469105 1986 0.082066975 1986 0.020469652 1986 -0.013345651 1987 -0.094257069 1987 0.089548602 1987 0.028814335 1987 -0.007236576 1988 -0.085571629 1988 0.096642379 1988 0.036732844 1988 -0.001069367 1989 -0.076525296 1989 0.103152258 1989 0.044084037 1989 0.005038701 1990 -0.067230865 1990 0.108882699 1990 0.050732673 1990 0.010970413 1991 -0.057800043 1991 0.113642272 1991 0.056551523 1991 0.016610487 1992 -0.048342128 1992 0.117247276 1992 0.061423404 1992 0.021847415 1993 -0.03896274 1993 0.119525273 1993 0.065243091 1993 0.02657527 1994 -0.029762625 1994 0.120318489 1994 0.067919067 1994 0.030695416 1995 -0.020836555 1995 0.119486994 1995 0.069375092 1995 0.034118116 1996 -0.012272331 1996 0.116911603 1996 0.069551542 1996 0.036763985 1997 -0.004149904 1997 0.112496421 1997 0.068406497 1997 0.03856527 1998 0.003459375 1998 0.106171001 1998 0.065916557 1998 0.039466938 1999 0.010493359 1999 0.097892035 1999 0.062077356 1999 0.039427535 2000 0.016899579 2000 0.087644564 2000 0.05690377 2000 0.038419817 2001 0.022635553 2001 0.075442674 2001 0.050429808 2001 0.036431132 2002 0.02766896 2002 0.061329648 2002 0.042708176 2002 0.033463541 2003 0.031977653 2003 0.045377578 2003 0.033809528 2003 0.029533689 2004 0.035549536 2004 0.027686447 2004 0.023821413 2004 0.024672424 2005 0.0383823 2005 0.008382681 2005 0.012846921 2005 0.018924164 2006 0.040483029 2006 -0.012382788 2006 0.001003077 2006 0.012346039 2007 0.041867683 2007 -0.034436909 2007 -0.011581023 2007 0.005006823 2008 0.042560481 2008 -0.057587316 2008 -0.024766267 2008 -0.003014339 2009 0.042593182 2009 -0.081625475 2009 -0.038405764 2009 -0.011629351 2010 0.042004295 2010 -0.106330122 2010 -0.0523472 2010 -0.020742736 2011 0.040838217 2011 -0.131470918 2011 -0.066435282 2011 -0.030253303 2012 0.039144336 2012 -0.15681225 2012 -0.080514225 2012 -0.040055888