1967.0000000;-0.4019283
1968.0000000;0.5289155
1969.0000000;-0.7011080
1970.0000000;-0.3968970
1971.0000000;-0.9570969
1972.0000000;-0.7539628
1973.0000000;-0.8605881
1974.0000000;-0.9287342
1975.0000000;-0.5782025
1976.0000000;-1.2690563
1977.0000000;0.5358900
1978.0000000;0.2855698
1979.0000000;-0.0278559
1980.0000000;0.6593317
1981.0000000;-0.0505479
1982.0000000;-0.1240885
1983.0000000;0.0158579
1984.0000000;1.2413445
1985.0000000;1.4049723
1986.0000000;-1.2032895
1987.0000000;0.9571513
1988.0000000;-0.0584403
1989.0000000;-0.6741652
1990.0000000;-1.7671322
1991.0000000;-0.8466016
1992.0000000;-1.2497172
1993.0000000;-0.5415146
1994.0000000;-0.1626736
1995.0000000;0.8547801
1996.0000000;-0.2008246
1997.0000000;-0.6338683
1998.0000000;-1.8578029
1999.0000000;-0.2844697
2000.0000000;-0.5273891
2001.0000000;0.5416868
2002.0000000;-0.7460350
2003.0000000;-1.9638331
2004.0000000;-1.4993703
2005.0000000;-1.7972484
2006.0000000;-0.9983345
2007.0000000;-0.6726407
2008.0000000;-1.3363240
2009.0000000;-2.2108090
2010.0000000;-0.8552516
2011.0000000;-1.9810340
2012.0000000;-2.0009413
2013.0000000;-0.7076205
2014.0000000;-1.1878092
2015.0000000;-1.9399307