1967.0000000;-1.0706761
1968.0000000;-0.0285333
1969.0000000;-0.2075821
1970.0000000;-0.8873696
1971.0000000;-0.4092119
1972.0000000;-0.2254696
1973.0000000;-1.4334307
1974.0000000;-0.8658974
1975.0000000;-0.8406612
1976.0000000;-0.8991954
1977.0000000;0.6211946
1978.0000000;0.4679242
1979.0000000;0.1945496
1980.0000000;0.0265276
1981.0000000;-0.4409289
1982.0000000;-0.1927671
1983.0000000;-0.2193170
1984.0000000;-0.0054907
1985.0000000;-0.5790207
1986.0000000;-1.2415270
1987.0000000;-0.8554722
1988.0000000;-0.3678119
1989.0000000;-1.6607392
1990.0000000;-1.0748551
1991.0000000;-0.7445506
1992.0000000;-1.0030612
1993.0000000;-0.6989004
1994.0000000;-0.5268023
1995.0000000;-0.2029364
1996.0000000;0.1105437
1997.0000000;-0.6069657
1998.0000000;-1.4792295
1999.0000000;-1.0417097
2000.0000000;-1.2921888
2001.0000000;0.8636652
2002.0000000;-0.7761889
2003.0000000;-2.4024606
2004.0000000;-1.5489035
2005.0000000;-1.9897282
2006.0000000;-1.5039902
2007.0000000;-1.3385584
2008.0000000;-0.7205530
2009.0000000;-1.6451453
2010.0000000;-0.3840654
2011.0000000;-1.7716534
2012.0000000;-1.6310430
2013.0000000;-0.5874360
2014.0000000;-0.9717748
2015.0000000;-2.0877647