1967.0000000;-0.8262665
1968.0000000;0.1081889
1969.0000000;-0.4575041
1970.0000000;-0.6973683
1971.0000000;-1.0540007
1972.0000000;-0.2477236
1973.0000000;-1.6463039
1974.0000000;-1.1944563
1975.0000000;-0.0215954
1976.0000000;-1.3092866
1977.0000000;0.5670203
1978.0000000;0.5382150
1979.0000000;-0.3054071
1980.0000000;0.3722252
1981.0000000;0.0475202
1982.0000000;-0.2246317
1983.0000000;-0.3687790
1984.0000000;0.2521718
1985.0000000;-0.5566396
1986.0000000;-1.3374557
1987.0000000;-0.5385269
1988.0000000;-0.1722503
1989.0000000;-1.4961693
1990.0000000;-1.4150909
1991.0000000;-0.8440427
1992.0000000;-0.6371047
1993.0000000;-0.6063567
1994.0000000;-0.6221259
1995.0000000;0.3583535
1996.0000000;-0.1980437
1997.0000000;-0.9884301
1998.0000000;-1.6620785
1999.0000000;-0.8285223
2000.0000000;-1.1247158
2001.0000000;0.3630072
2002.0000000;-1.4673221
2003.0000000;-2.9363036
2004.0000000;-1.8264227
2005.0000000;-2.1065261
2006.0000000;-1.9619906
2007.0000000;-1.6334035
2008.0000000;-1.2179956
2009.0000000;-2.2540283
2010.0000000;-0.6733252
2011.0000000;-2.1661410
2012.0000000;-1.8744321
2013.0000000;-0.5048984
2014.0000000;-0.7494654
2015.0000000;-1.9980614