1958  -1.171237
1959  0.5493127
1960  -0.5131
1961  -0.9450839
1962  1.176403
1963  -0.1681717
1964  0.4177667
1965  1.443047
1966  -0.5820336
1967  -0.7780719
1968  0.3085757
1969  1.297389
1970  0.2415878
1971  0.1161034
1972  -0.7192733
1973  -1.073816
1974  -0.6338663
1975  -0.5945034
1976  0.32312
1977  0.8556033
1978  -1.878767
1979  0.7399864
1980  1.585289
1981  -1.500071
1982  0.9468932
1983  1.937839
1984  -0.4395433
1985  -1.097648
1986  0.08240499
1987  1.025026
1988  0.2286871
1989  0.09395287
1990  -0.7613043
1991  0.7304577
1992  0.4643457
1993  2.305274
1994  -1.946352
1995  0.2771215
1996  0.3118538
1997  -1.556545
1998  2.103371
1999  0.04541887
2000  -0.3648358
2001  -0.3450823
2002  -0.6364276
2003  1.030376
2004  -1.420961
2005  -0.04752098
2006  -0.5790299
2007  -0.04566001
2008  -0.1594369
2009  0.3300674
2010  -0.4938171
2011  -0.5964559
2012  -1.221799
2013  -1.19851
2014  1.015514
2015  1.486136