1967.0000000;-1.1762829
1968.0000000;0.1359525
1969.0000000;-0.6127972
1970.0000000;-0.6007549
1971.0000000;-1.3008957
1972.0000000;-0.4941503
1973.0000000;-1.0306664
1974.0000000;-0.8763344
1975.0000000;-0.4709003
1976.0000000;-1.3486438
1977.0000000;-0.1481972
1978.0000000;0.2730453
1979.0000000;-0.2985435
1980.0000000;0.1862923
1981.0000000;0.0099653
1982.0000000;-0.1152336
1983.0000000;-0.3000708
1984.0000000;0.9517465
1985.0000000;0.5572690
1986.0000000;-1.2029374
1987.0000000;-0.1877473
1988.0000000;0.3948384
1989.0000000;-1.3664032
1990.0000000;-1.6594861
1991.0000000;-1.5581421
1992.0000000;-1.5516884
1993.0000000;-0.6639163
1994.0000000;-0.4010308
1995.0000000;0.6586556
1996.0000000;-0.1426305
1997.0000000;-0.8407031
1998.0000000;-1.6090931
1999.0000000;-0.7846482
2000.0000000;-0.9687814
2001.0000000;0.8075933
2002.0000000;-0.6198334
2003.0000000;-2.3367591
2004.0000000;-1.7720238
2005.0000000;-1.8820589
2006.0000000;-1.2658557
2007.0000000;-1.0460762
2008.0000000;-1.3345604
2009.0000000;-2.0617232
2010.0000000;-0.8927921
2011.0000000;-1.9674754
2012.0000000;-2.0803499
2013.0000000;-0.6227409
2014.0000000;-0.9675427
2015.0000000;-1.8575389