1967.0000000;-0.7291557
1968.0000000;-0.5964829
1969.0000000;-0.6317500
1970.0000000;-0.7287521
1971.0000000;-1.4784086
1972.0000000;-0.5842087
1973.0000000;-1.2953596
1974.0000000;-0.6918417
1975.0000000;-0.5248834
1976.0000000;-1.3000231
1977.0000000;-0.2045157
1978.0000000;0.5006664
1979.0000000;-0.1704139
1980.0000000;0.4397116
1981.0000000;0.2029609
1982.0000000;0.1095674
1983.0000000;-0.2497052
1984.0000000;0.5636601
1985.0000000;-0.1625362
1986.0000000;-1.2416456
1987.0000000;-0.1416340
1988.0000000;0.1032878
1989.0000000;-1.3367934
1990.0000000;-1.2248561
1991.0000000;-1.1587996
1992.0000000;-1.0557231
1993.0000000;-0.5386824
1994.0000000;-0.3702202
1995.0000000;0.8137612
1996.0000000;-0.3162379
1997.0000000;-0.8479598
1998.0000000;-1.5924557
1999.0000000;-0.8694777
2000.0000000;-0.7547214
2001.0000000;0.3331885
2002.0000000;-1.1610396
2003.0000000;-2.7569106
2004.0000000;-1.5729010
2005.0000000;-1.9756463
2006.0000000;-1.2677689
2007.0000000;-1.0629869
2008.0000000;-1.2211229
2009.0000000;-2.4259121
2010.0000000;-0.6097062
2011.0000000;-2.3583601
2012.0000000;-2.0822928
2013.0000000;-0.5083668
2014.0000000;-0.8439537
2015.0000000;-1.9903631