1967.0000000;-1.0722927
1968.0000000;-0.1913915
1969.0000000;-0.7174315
1970.0000000;-0.4929042
1971.0000000;-1.3706961
1972.0000000;-0.4166356
1973.0000000;-0.9812267
1974.0000000;-0.8175151
1975.0000000;-0.4144492
1976.0000000;-1.3270302
1977.0000000;-0.2738401
1978.0000000;0.3793949
1979.0000000;-0.3787446
1980.0000000;0.1732239
1981.0000000;0.0455226
1982.0000000;-0.0905540
1983.0000000;-0.2791540
1984.0000000;1.1684462
1985.0000000;0.6166958
1986.0000000;-1.2896602
1987.0000000;-0.1141706
1988.0000000;0.5925602
1989.0000000;-1.3509140
1990.0000000;-1.5272708
1991.0000000;-1.6542785
1992.0000000;-1.5092212
1993.0000000;-0.6596988
1994.0000000;-0.3882133
1995.0000000;0.8025037
1996.0000000;-0.1067626
1997.0000000;-0.7987782
1998.0000000;-1.5956757
1999.0000000;-0.7318220
2000.0000000;-0.9970254
2001.0000000;0.8871027
2002.0000000;-0.5373360
2003.0000000;-2.4646020
2004.0000000;-1.8903840
2005.0000000;-1.9714668
2006.0000000;-1.3988358
2007.0000000;-0.9246867
2008.0000000;-1.3202074
2009.0000000;-2.2321484
2010.0000000;-0.8323945
2011.0000000;-2.0992486
2012.0000000;-2.2273989
2013.0000000;-0.7489167
2014.0000000;-0.9342096
2015.0000000;-2.0058804