1967.0000000;-0.7261732
1968.0000000;0.2922249
1969.0000000;-0.5220122
1970.0000000;-0.9796401
1971.0000000;-0.5872024
1972.0000000;-0.1297970
1973.0000000;-1.6680427
1974.0000000;-0.9855912
1975.0000000;-0.6945695
1976.0000000;-1.1139551
1977.0000000;0.6774665
1978.0000000;0.4758089
1979.0000000;0.2164138
1980.0000000;0.2908468
1981.0000000;-0.4493551
1982.0000000;-0.2844816
1983.0000000;-0.2363892
1984.0000000;0.1203180
1985.0000000;-0.5833561
1986.0000000;-1.4101593
1987.0000000;-1.1663799
1988.0000000;-0.3947564
1989.0000000;-1.4141178
1990.0000000;-1.2832806
1991.0000000;-0.8485226
1992.0000000;-0.7485632
1993.0000000;-0.7285021
1994.0000000;-0.4789858
1995.0000000;0.1241302
1996.0000000;0.0259593
1997.0000000;-0.5681310
1998.0000000;-1.7800311
1999.0000000;-0.9702380
2000.0000000;-1.0383676
2001.0000000;0.2439930
2002.0000000;-1.6484458
2003.0000000;-2.9602675
2004.0000000;-1.6789386
2005.0000000;-2.3544226
2006.0000000;-2.1708534
2007.0000000;-2.0422788
2008.0000000;-1.3728051
2009.0000000;-2.2794328
2010.0000000;-0.6385386
2011.0000000;-2.5568767
2012.0000000;-2.0691419
2013.0000000;-0.7158134
2014.0000000;-1.1043730
2015.0000000;-2.2975435