1967.0000000;-1.1838362
1968.0000000;0.1703842
1969.0000000;-0.2662773
1970.0000000;-0.9569496
1971.0000000;-1.0865086
1972.0000000;-0.0303642
1973.0000000;-0.8728647
1974.0000000;-1.0080087
1975.0000000;-0.1174943
1976.0000000;-0.4170492
1977.0000000;0.4525253
1978.0000000;0.4428254
1979.0000000;-0.8063998
1980.0000000;-0.0062546
1981.0000000;-0.1103759
1982.0000000;-0.6814405
1983.0000000;-0.5460609
1984.0000000;0.8292863
1985.0000000;0.2406907
1986.0000000;-1.2870328
1987.0000000;-0.8464315
1988.0000000;-0.7556447
1989.0000000;-1.5908625
1990.0000000;-1.6177025
1991.0000000;-1.7966330
1992.0000000;-1.6944714
1993.0000000;-0.7271909
1994.0000000;-0.5351780
1995.0000000;0.4115221
1996.0000000;-0.7500000
1997.0000000;-0.9398278
1998.0000000;-1.9227450
1999.0000000;-0.8652372
2000.0000000;-0.9432027
2001.0000000;0.7117800
2002.0000000;0.0811096
2003.0000000;-2.1858411
2004.0000000;-1.9238962
2005.0000000;-1.8459725
2006.0000000;-1.4690874
2007.0000000;-1.3163314
2008.0000000;-1.0063345
2009.0000000;-1.7434930
2010.0000000;-0.9043591
2011.0000000;-1.9695276
2012.0000000;-2.0654902
2013.0000000;-1.3533839
2014.0000000;-1.3866180
2015.0000000;-1.6232524