1967.0000000;-1.0405142
1968.0000000;0.3530396
1969.0000000;-0.2474347
1970.0000000;-0.7609879
1971.0000000;-1.0686171
1972.0000000;-0.0004540
1973.0000000;-0.6446900
1974.0000000;-0.8660986
1975.0000000;-0.0860283
1976.0000000;-0.3368318
1977.0000000;0.4135203
1978.0000000;0.3549609
1979.0000000;-0.6825316
1980.0000000;-0.1153952
1981.0000000;-0.0520028
1982.0000000;-0.5989942
1983.0000000;-0.3732724
1984.0000000;0.8785089
1985.0000000;0.3493767
1986.0000000;-1.2659793
1987.0000000;-0.7266691
1988.0000000;-0.7976459
1989.0000000;-1.5412817
1990.0000000;-1.4305520
1991.0000000;-1.7343622
1992.0000000;-1.5385451
1993.0000000;-0.7514889
1994.0000000;-0.4698209
1995.0000000;0.4285765
1996.0000000;-0.5031784
1997.0000000;-0.8118499
1998.0000000;-1.7840145
1999.0000000;-0.7444247
2000.0000000;-0.8802204
2001.0000000;0.6995636
2002.0000000;0.1572109
2003.0000000;-2.0436094
2004.0000000;-1.8704927
2005.0000000;-1.8116856
2006.0000000;-1.3414422
2007.0000000;-1.0950633
2008.0000000;-0.9066994
2009.0000000;-1.6204846
2010.0000000;-0.6853861
2011.0000000;-1.7948725
2012.0000000;-1.8957489
2013.0000000;-1.1772008
2014.0000000;-1.1491444
2015.0000000;-1.0689635