1967.0000000;-1.6818123
1968.0000000;0.8700887
1969.0000000;-0.4473234
1970.0000000;-0.9920846
1971.0000000;-0.5497365
1972.0000000;-0.0414992
1973.0000000;-0.6688826
1974.0000000;-1.3513350
1975.0000000;-0.6940448
1976.0000000;-1.3737633
1977.0000000;0.8134608
1978.0000000;0.2457035
1979.0000000;-0.7596003
1980.0000000;-0.3818601
1981.0000000;-1.3114386
1982.0000000;-1.0112349
1983.0000000;-0.1922204
1984.0000000;0.3665339
1985.0000000;-1.1279078
1986.0000000;-1.3848001
1987.0000000;-0.5659472
1988.0000000;-0.5245469
1989.0000000;-1.6524746
1990.0000000;-0.7730845
1991.0000000;-1.1909728
1992.0000000;-0.5988808
1993.0000000;-0.8891793
1994.0000000;-0.4342792
1995.0000000;-0.1151170
1996.0000000;-0.3856999
1997.0000000;-0.3016294
1998.0000000;-1.6764723
1999.0000000;-1.1937592
2000.0000000;-1.3061780
2001.0000000;0.3915707
2002.0000000;-0.8694227
2003.0000000;-2.0096812
2004.0000000;-2.0257292
2005.0000000;-2.2593801
2006.0000000;-1.6886361
2007.0000000;-1.8592762
2008.0000000;-0.9932804
2009.0000000;-1.9747078
2010.0000000;-0.9596102
2011.0000000;-2.3597975
2012.0000000;-2.0944118
2013.0000000;-1.1977623
2014.0000000;-1.4584463
2015.0000000;-2.5061147