1967.0000000;-1.5215364
1968.0000000;0.1289970
1969.0000000;-0.8581649
1970.0000000;-0.7980356
1971.0000000;-1.6490871
1972.0000000;-0.6847304
1973.0000000;-1.0994802
1974.0000000;-1.1339860
1975.0000000;-0.6892074
1976.0000000;-1.5904646
1977.0000000;0.0489552
1978.0000000;0.2658641
1979.0000000;-0.4527727
1980.0000000;0.1814921
1981.0000000;0.0253212
1982.0000000;-0.0857176
1983.0000000;-0.2328207
1984.0000000;0.9441758
1985.0000000;0.4179072
1986.0000000;-1.3151530
1987.0000000;-0.2070960
1988.0000000;0.3450799
1989.0000000;-1.5062040
1990.0000000;-1.8036449
1991.0000000;-1.6748409
1992.0000000;-1.6024731
1993.0000000;-0.7498757
1994.0000000;-0.4535416
1995.0000000;0.6980078
1996.0000000;-0.3152536
1997.0000000;-0.8993326
1998.0000000;-1.7804933
1999.0000000;-0.8803722
2000.0000000;-1.0823140
2001.0000000;0.7607254
2002.0000000;-1.1849085
2003.0000000;-2.5157599
2004.0000000;-1.9978426
2005.0000000;-2.1644301
2006.0000000;-1.5534348
2007.0000000;-1.4606667
2008.0000000;-1.5454521
2009.0000000;-2.3016238
2010.0000000;-1.2935494
2011.0000000;-2.3387351
2012.0000000;-2.3884132
2013.0000000;-0.7819339
2014.0000000;-1.0838797
2015.0000000;-2.2351103