1967.0000000;-0.8394305
1968.0000000;0.0644704
1969.0000000;-0.4193235
1970.0000000;-0.1316305
1971.0000000;-0.8606614
1972.0000000;-0.4939985
1973.0000000;-1.0250874
1974.0000000;-0.7404274
1975.0000000;-0.5099665
1976.0000000;-1.2317470
1977.0000000;-0.2104290
1978.0000000;0.3676254
1979.0000000;-0.0283268
1980.0000000;0.2314417
1981.0000000;-0.1166871
1982.0000000;-0.0976145
1983.0000000;-0.0589159
1984.0000000;1.1593947
1985.0000000;1.0954676
1986.0000000;-0.8637052
1987.0000000;0.5081425
1988.0000000;0.4457515
1989.0000000;-1.0441582
1990.0000000;-1.4642930
1991.0000000;-1.1932728
1992.0000000;-1.3413799
1993.0000000;-0.6487245
1994.0000000;-0.2373768
1995.0000000;0.7270160
1996.0000000;-0.2806977
1997.0000000;-0.8541777
1998.0000000;-1.6240320
1999.0000000;-0.5604842
2000.0000000;-0.6105171
2001.0000000;0.7527297
2002.0000000;-0.5207686
2003.0000000;-2.0858741
2004.0000000;-1.6135042
2005.0000000;-1.7147655
2006.0000000;-0.9606963
2007.0000000;-0.8100017
2008.0000000;-1.0989487
2009.0000000;-1.8648785
2010.0000000;-0.6872474
2011.0000000;-1.8983728
2012.0000000;-1.7765247
2013.0000000;-0.4598850
2014.0000000;-1.0531032
2015.0000000;-1.6132865