1967.0000000;-0.6615525
1968.0000000;0.6253636
1969.0000000;-0.6154777
1970.0000000;-0.4645905
1971.0000000;-1.3584738
1972.0000000;-0.4771985
1973.0000000;-0.8451067
1974.0000000;-1.0160797
1975.0000000;-0.6654874
1976.0000000;-1.3924243
1977.0000000;0.0488323
1978.0000000;0.3682836
1979.0000000;-0.2548731
1980.0000000;0.3552907
1981.0000000;0.2374811
1982.0000000;-0.0742391
1983.0000000;-0.1637492
1984.0000000;1.3938359
1985.0000000;0.8617716
1986.0000000;-1.1613611
1987.0000000;0.2015377
1988.0000000;0.4487362
1989.0000000;-1.3018987
1990.0000000;-1.8604414
1991.0000000;-1.5290062
1992.0000000;-1.8124037
1993.0000000;-0.7843277
1994.0000000;-0.7300003
1995.0000000;0.8023985
1996.0000000;-0.1254479
1997.0000000;-0.8911968
1998.0000000;-1.7164984
1999.0000000;-0.7642130
2000.0000000;-1.0866073
2001.0000000;0.9491114
2002.0000000;-0.8033989
2003.0000000;-2.4385433
2004.0000000;-2.0055830
2005.0000000;-2.0544767
2006.0000000;-1.2494714
2007.0000000;-1.1627620
2008.0000000;-1.5692873
2009.0000000;-2.1464653
2010.0000000;-1.2759522
2011.0000000;-2.3498011
2012.0000000;-2.4355841
2013.0000000;-1.3138716
2014.0000000;-1.4736989
2015.0000000;-2.3994310