Hurrell PC-Based North Atlantic Oscillation Index (DJF)
  1899   -0.53
  1900   -1.24
  1901   -0.28
  1902   -0.75
  1903    0.93
  1904   -0.06
  1905    0.75
  1906    0.83
  1907    0.79
  1908    0.48
  1909    0.15
  1910    0.22
  1911    0.45
  1912   -0.88
  1913    0.69
  1914    0.48
  1915   -0.21
  1916    0.39
  1917   -1.30
  1918   -0.04
  1919   -0.97
  1920    1.11
  1921    0.07
  1922    0.52
  1923    0.41
  1924   -0.05
  1925    1.35
  1926   -0.63
  1927    0.35
  1928    0.39
  1929   -0.92
  1930    0.55
  1931   -0.08
  1932    0.36
  1933   -0.07
  1934    0.92
  1935    0.12
  1936   -1.98
  1937    0.41
  1938    0.06
  1939   -0.25
  1940   -1.93
  1941   -1.15
  1942   -0.78
  1943    0.47
  1944    0.78
  1945   -0.39
  1946   -0.28
  1947   -1.80
  1948   -0.41
  1949    1.30
  1950    0.36
  1951   -0.47
  1952    0.65
  1953   -0.28
  1954    0.23
  1955   -0.99
  1956   -1.28
  1957    0.60
  1958   -0.50
  1959   -0.18
  1960   -1.62
  1961    0.46
  1962    0.05
  1963   -1.62
  1964   -0.71
  1965   -0.68
  1966   -1.93
  1967   -0.02
  1968   -0.60
  1969   -2.36
  1970   -1.09
  1971   -0.47
  1972   -0.06
  1973    1.13
  1974    0.48
  1975    1.01
  1976    1.13
  1977   -1.67
  1978   -1.09
  1979   -2.02
  1980   -0.19
  1981    0.98
  1982   -0.83
  1983    1.37
  1984    1.04
  1985   -0.99
  1986   -0.91
  1987   -0.51
  1988   -0.22
  1989    2.40
  1990    1.24
  1991    0.91
  1992    1.59
  1993    1.79
  1994    0.26
  1995    1.35
  1996   -1.37
  1997    0.20
  1998   -0.22
  1999    1.08
  2000    1.80
  2001   -0.65
  2002    0.52
  2003   -0.33
  2004   -0.37
  2005    1.03
  2006   -0.44
  2007    0.87
  2008    1.11
  2009   -0.10
  2010   -2.94
  2011   -1.17
  2012    1.47
  2013   -0.82
  2014    0.59
  2015    1.63
  2016    0.94
  2017    0.74
  2018    0.50
  2019    0.17
  2020    1.81
  2021   -1.33
  2022    1.17