1967.0000000;-0.2597422
1968.0000000;0.3915059
1969.0000000;-0.8741904
1970.0000000;-0.3460224
1971.0000000;-1.1614671
1972.0000000;-0.6295443
1973.0000000;-0.9187108
1974.0000000;-0.8115270
1975.0000000;-0.3412974
1976.0000000;-1.3793309
1977.0000000;0.4076952
1978.0000000;0.4240549
1979.0000000;0.0268021
1980.0000000;0.8115526
1981.0000000;0.2189245
1982.0000000;-0.1739660
1983.0000000;-0.0244181
1984.0000000;1.2166723
1985.0000000;0.8105534
1986.0000000;-1.3470930
1987.0000000;0.5427297
1988.0000000;0.4261798
1989.0000000;-0.6510252
1990.0000000;-1.4760305
1991.0000000;-1.0841718
1992.0000000;-0.9891647
1993.0000000;-0.4747906
1994.0000000;-0.2660053
1995.0000000;1.0968436
1996.0000000;-0.0010266
1997.0000000;-0.5136782
1998.0000000;-1.5001708
1999.0000000;-0.5528808
2000.0000000;-0.8160127
2001.0000000;0.6274753
2002.0000000;-0.7474892
2003.0000000;-2.5917401
2004.0000000;-1.7865529
2005.0000000;-1.9332469
2006.0000000;-1.0426459
2007.0000000;-0.6356330
2008.0000000;-1.4830508
2009.0000000;-2.7297785
2010.0000000;-0.5812496
2011.0000000;-2.6850097
2012.0000000;-2.5596526
2013.0000000;-1.1070184
2014.0000000;-0.9656396
2015.0000000;-2.4037099