Hurrell PC-Based North Atlantic Oscillation Index (DJFM) 1899 -0.70 1900 -1.34 1901 -0.38 1902 -0.69 1903 1.31 1904 -0.03 1905 0.80 1906 0.81 1907 1.06 1908 0.53 1909 -0.52 1910 0.41 1911 0.44 1912 -0.44 1913 1.38 1914 0.46 1915 -0.70 1916 -0.23 1917 -1.19 1918 0.01 1919 -0.88 1920 1.55 1921 0.66 1922 0.57 1923 0.34 1924 -0.66 1925 1.05 1926 -0.31 1927 0.47 1928 0.13 1929 -0.62 1930 0.40 1931 -0.70 1932 -0.12 1933 -0.12 1934 0.93 1935 0.06 1936 -1.93 1937 -0.16 1938 0.52 1939 -0.15 1940 -1.94 1941 -1.23 1942 -1.10 1943 0.59 1944 0.50 1945 -0.11 1946 -0.28 1947 -1.87 1948 0.24 1949 0.99 1950 0.46 1951 -0.94 1952 -0.15 1953 -0.04 1954 0.11 1955 -1.24 1956 -1.05 1957 0.03 1958 -1.25 1959 0.08 1960 -1.81 1961 0.72 1962 -0.92 1963 -1.30 1964 -0.89 1965 -0.82 1966 -1.55 1967 0.60 1968 -0.16 1969 -2.57 1970 -1.16 1971 -0.67 1972 0.08 1973 1.17 1974 0.35 1975 0.72 1976 1.19 1977 -1.35 1978 -0.56 1979 -1.44 1980 -0.38 1981 0.28 1982 -0.22 1983 1.26 1984 0.39 1985 -0.83 1986 -0.04 1987 -0.69 1988 -0.18 1989 2.43 1990 1.90 1991 0.53 1992 1.72 1993 1.73 1994 0.86 1995 1.29 1996 -1.46 1997 0.69 1998 -0.02 1999 0.64 2000 1.59 2001 -1.01 2002 0.61 2003 0.03 2004 -0.13 2005 0.34 2006 -0.91 2007 1.15 2008 1.04 2009 0.03 2010 -2.56 2011 -0.68 2012 1.56 2013 -1.68 2014 0.90 2015 1.83 2016 0.99 2017 0.87 2018 -0.17 2019 0.74 2020 1.78 2021 -0.72 2022 1.08