1967.0000000;-1.0655535
1968.0000000;0.0782566
1969.0000000;-0.6894459
1970.0000000;-0.4856634
1971.0000000;-1.4415666
1972.0000000;-0.5895329
1973.0000000;-0.9348305
1974.0000000;-0.9318709
1975.0000000;-0.5421239
1976.0000000;-1.4815505
1977.0000000;-0.1489369
1978.0000000;0.3606075
1979.0000000;-0.2317520
1980.0000000;0.3577222
1981.0000000;0.0836980
1982.0000000;-0.0157036
1983.0000000;-0.2080329
1984.0000000;1.1202885
1985.0000000;0.6910657
1986.0000000;-1.2073951
1987.0000000;0.0011328
1988.0000000;0.3032074
1989.0000000;-1.3409888
1990.0000000;-1.5635486
1991.0000000;-1.5886674
1992.0000000;-1.6125562
1993.0000000;-0.6634372
1994.0000000;-0.4089401
1995.0000000;0.7711248
1996.0000000;-0.2261889
1997.0000000;-0.8491454
1998.0000000;-1.6984197
1999.0000000;-0.7461644
2000.0000000;-0.8237624
2001.0000000;0.7485083
2002.0000000;-0.8278520
2003.0000000;-2.3672774
2004.0000000;-1.8758459
2005.0000000;-2.0152240
2006.0000000;-1.3803465
2007.0000000;-1.1685913
2008.0000000;-1.4547079
2009.0000000;-2.1022234
2010.0000000;-0.9704359
2011.0000000;-2.0894837
2012.0000000;-2.2070913
2013.0000000;-0.6500348
2014.0000000;-0.9921150
2015.0000000;-1.9293562