1967.0000000;-1.6847713
1968.0000000;0.3058299
1969.0000000;-1.0604787
1970.0000000;-0.5929484
1971.0000000;-1.3932619
1972.0000000;-0.5771598
1973.0000000;-0.9460859
1974.0000000;-1.0019917
1975.0000000;-0.7790717
1976.0000000;-1.3326893
1977.0000000;-0.2258246
1978.0000000;0.1906470
1979.0000000;-0.1193428
1980.0000000;-0.2125169
1981.0000000;-0.3627705
1982.0000000;-0.1196475
1983.0000000;-0.2684766
1984.0000000;1.2470578
1985.0000000;0.9247164
1986.0000000;-1.3149250
1987.0000000;-0.1391578
1988.0000000;0.4076873
1989.0000000;-1.4208583
1990.0000000;-1.7893841
1991.0000000;-1.9067843
1992.0000000;-1.4529969
1993.0000000;-0.7632886
1994.0000000;-0.4658679
1995.0000000;0.6611026
1996.0000000;-0.2975099
1997.0000000;-0.8914254
1998.0000000;-1.8044910
1999.0000000;-0.6558070
2000.0000000;-1.0902500
2001.0000000;0.8173419
2002.0000000;-0.3347607
2003.0000000;-2.3302050
2004.0000000;-1.9534533
2005.0000000;-2.0275543
2006.0000000;-1.4939172
2007.0000000;-0.9288919
2008.0000000;-1.6200562
2009.0000000;-2.2054698
2010.0000000;-1.2680616
2011.0000000;-2.1985896
2012.0000000;-2.3614364
2013.0000000;-1.0964019
2014.0000000;-1.0782580
2015.0000000;-1.9838281