1967.0000000;-1.1749800
1968.0000000;0.4357436
1969.0000000;-0.4736471
1970.0000000;-0.3737112
1971.0000000;-1.3665488
1972.0000000;-0.5007449
1973.0000000;-0.8352606
1974.0000000;-0.8375626
1975.0000000;-0.5782436
1976.0000000;-1.4245398
1977.0000000;-0.2761841
1978.0000000;0.2614029
1979.0000000;-0.3064614
1980.0000000;0.2087813
1981.0000000;-0.0153040
1982.0000000;-0.1060154
1983.0000000;-0.1792365
1984.0000000;1.2672359
1985.0000000;0.7809417
1986.0000000;-1.1999283
1987.0000000;0.1022985
1988.0000000;0.4109722
1989.0000000;-1.2983997
1990.0000000;-1.5844522
1991.0000000;-1.6069312
1992.0000000;-1.4548936
1993.0000000;-0.7023485
1994.0000000;-0.4291986
1995.0000000;0.7508376
1996.0000000;-0.1638317
1997.0000000;-0.8110398
1998.0000000;-1.6600637
1999.0000000;-0.7042575
2000.0000000;-0.8527939
2001.0000000;0.7294144
2002.0000000;-0.6703195
2003.0000000;-2.2971854
2004.0000000;-1.9011970
2005.0000000;-1.9658744
2006.0000000;-1.3461461
2007.0000000;-1.0847220
2008.0000000;-1.4772613
2009.0000000;-2.0404429
2010.0000000;-0.9397300
2011.0000000;-2.1075788
2012.0000000;-2.2908940
2013.0000000;-0.7042461
2014.0000000;-1.0140114
2015.0000000;-1.9195958