Year NDJFM_AMO 1949 0.110231788 1950 0.042403974 1951 0.059198675 1952 0.188940789 1953 0.239125828 1954 0.188397351 1955 0.017397351 1956 0.188914474 1957 -0.052165563 1958 0.150039735 1959 0.119231788 1960 0.128947368 1961 0.136721854 1962 0.150503311 1963 0.139278146 1964 -0.026427632 1965 -0.147099338 1966 -0.095887417 1967 0.042986755 1968 -0.208361842 1969 0.001317881 1970 -0.038854305 1971 -0.259675497 1972 -0.337868421 1973 -0.347370861 1974 -0.281642384 1975 -0.340298013 1976 -0.395572368 1977 -0.349516556 1978 -0.150953642 1979 -0.17402649 1980 -0.070243421 1981 -0.15581457 1982 -0.068966887 1983 -0.217695364 1984 -0.088493421 1985 -0.349086093 1986 -0.302357616 1987 -0.252311258 1988 -0.031177632 1989 -0.185701987 1990 -0.185794702 1991 -0.091013245 1992 -0.169013158 1993 -0.257516556 1994 -0.297675497 1995 -0.039112583 1996 0.013657895 1997 -0.090721854 1998 0.183781457 1999 0.155463576 2000 -0.010190789 2001 -0.065013245 2002 0.172245033 2003 0.035443709 2004 0.204625 2005 0.186569536 2006 0.123635762 2007 0.193940397 2008 0.120342105 2009 -0.071271523 2010 0.130701987 2011 0.150470199 2012 -0.030184211 2013 0.141768212 2014 -0.004509934 2015 -0.004046358 2016 0.198440789 2017 0.268827815