1979  0.686548
1980  1.38415
1981  -1.482889
1982  0.984033
1983  1.82432
1984  -0.4871252
1985  -1.070683
1986  0.02015588
1987  0.9469845
1988  0.02785957
1989  0.02407086
1990  -0.9001214
1991  0.5846478
1992  0.4424707
1993  2.145044
1994  -1.813365
1995  0.2264462
1996  0.1922103
1997  -1.471178
1998  1.97504
1999  0.1077409
2000  -0.3154295
2001  -0.3220326
2002  -0.5943224
2003  0.8729017
2004  -1.448737
2005  -0.06873924
2006  -0.7027133
2007  -0.1170907
2008  -0.168409
2009  0.1443574
2010  -0.5011311
2011  -0.6843939
2012  -1.221249
2013  -1.262839
2014  0.9092129
2015  1.334766
2016  -0.2005119