1967.0000000;-1.2164445
1968.0000000;0.1713297
1969.0000000;-0.4869474
1970.0000000;-0.9774867
1971.0000000;-0.8995855
1972.0000000;-0.1182918
1973.0000000;-1.3349384
1974.0000000;-1.3099829
1975.0000000;-0.0372689
1976.0000000;-1.4244196
1977.0000000;0.6183109
1978.0000000;0.4485370
1979.0000000;-0.6924406
1980.0000000;0.1090193
1981.0000000;-0.4600238
1982.0000000;-0.4166332
1983.0000000;-0.3612313
1984.0000000;0.4846189
1985.0000000;-0.5432649
1986.0000000;-1.3269083
1987.0000000;-0.4480608
1988.0000000;-0.1137330
1989.0000000;-1.6323719
1990.0000000;-1.3673487
1991.0000000;-0.9857732
1992.0000000;-1.0626494
1993.0000000;-0.6495643
1994.0000000;-0.2208259
1995.0000000;0.2228415
1996.0000000;-0.5219820
1997.0000000;-0.6009220
1998.0000000;-1.6349429
1999.0000000;-0.5712429
2000.0000000;-1.0140481
2001.0000000;0.6904993
2002.0000000;-1.0877407
2003.0000000;-2.6679478
2004.0000000;-2.0925131
2005.0000000;-2.2413478
2006.0000000;-1.9275098
2007.0000000;-1.7996973
2008.0000000;-1.1887360
2009.0000000;-2.2977629
2010.0000000;-0.9757406
2011.0000000;-2.3750198
2012.0000000;-2.1102433
2013.0000000;-0.8220460
2014.0000000;-1.2091960
2015.0000000;-2.2583265