1948  -2.397803
1949  -2.339589
1950  -2.313604
1951  -1.635791
1952  -0.2219483
1953  -0.1497974
1954  0.1765603
1955  -1.13755
1956  0.7508989
1957  1.038513
1958  -0.86448
1959  0.204447
1960  -0.5216587
1961  -0.9302961
1962  0.9962791
1963  -0.7085469
1964  -0.3531975
1965  0.9765092
1966  -0.5664213
1967  -0.5425
1968  0.2533649
1969  0.9904804
1970  0.0108332
1971  0.06277538
1972  -0.54237
1973  -0.8496719
1974  -0.6355703
1975  -0.3073192
1976  0.3517094
1977  1.024095
1978  -1.410921
1979  0.8784287
1980  1.374293
1981  -1.354779
1982  0.8914025
1983  1.872151
1984  -0.2488716
1985  -0.6375194
1986  0.1909928
1987  1.361571
1988  0.4988973
1989  0.4483247
1990  -0.5127463
1991  0.8480088
1992  0.5238229
1993  2.244581
1994  -1.505736
1995  0.4913466
1996  0.4860683
1997  -0.9971167
1998  2.103285
1999  0.300891
2000  -0.04187073
2001  -0.07126361
2002  -0.373481
2003  1.149962
2004  -1.133506
2005  0.154495
2006  -0.1718332
2007  0.2163648
2008  0.2494851
2009  0.6775504
2010  -0.07438817
2011  -0.168422
2012  -0.6326431
2013  -0.6114743
2014  1.272124
2015  1.695396
2016  0.198779