1967.0000000;-1.4933939
1968.0000000;0.2452302
1969.0000000;-0.6658291
1970.0000000;-0.6583613
1971.0000000;-1.5976957
1972.0000000;-0.5250856
1973.0000000;-1.0673225
1974.0000000;-1.0898499
1975.0000000;-0.5119488
1976.0000000;-1.5159013
1977.0000000;-0.3012748
1978.0000000;0.3234626
1979.0000000;-0.5011300
1980.0000000;0.1334824
1981.0000000;0.0054847
1982.0000000;-0.1594700
1983.0000000;-0.2772956
1984.0000000;1.1249355
1985.0000000;0.6580110
1986.0000000;-1.3413517
1987.0000000;-0.0838025
1988.0000000;0.5387222
1989.0000000;-1.4342210
1990.0000000;-1.8078468
1991.0000000;-1.7403654
1992.0000000;-1.5373259
1993.0000000;-0.7857298
1994.0000000;-0.4930643
1995.0000000;0.7643323
1996.0000000;-0.3987361
1997.0000000;-0.8880684
1998.0000000;-1.7821589
1999.0000000;-0.7866240
2000.0000000;-1.1283795
2001.0000000;0.8530474
2002.0000000;-1.0136416
2003.0000000;-2.5885749
2004.0000000;-2.0215218
2005.0000000;-2.1221352
2006.0000000;-1.5869110
2007.0000000;-1.4084703
2008.0000000;-1.5605216
2009.0000000;-2.3537145
2010.0000000;-1.2994931
2011.0000000;-2.3183236
2012.0000000;-2.4536130
2013.0000000;-0.9681145
2014.0000000;-1.1349047
2015.0000000;-2.2079954