1967.0000000;-1.5585510
1968.0000000;0.0263343
1969.0000000;-0.3453308
1970.0000000;-1.2318983
1971.0000000;-1.5178444
1972.0000000;-0.1982934
1973.0000000;-1.4327830
1974.0000000;-1.2401896
1975.0000000;-0.4244131
1976.0000000;-0.7300236
1977.0000000;0.6429194
1978.0000000;0.3082700
1979.0000000;-1.3238651
1980.0000000;0.0303391
1981.0000000;-0.4343335
1982.0000000;-1.0663730
1983.0000000;-0.5950994
1984.0000000;0.5490372
1985.0000000;-0.4448002
1986.0000000;-1.4986446
1987.0000000;-1.3371619
1988.0000000;-0.9200343
1989.0000000;-1.7216873
1990.0000000;-1.7176058
1991.0000000;-1.9194343
1992.0000000;-1.9203284
1993.0000000;-1.0407722
1994.0000000;-0.7752390
1995.0000000;0.0945407
1996.0000000;-0.8745973
1997.0000000;-1.2033069
1998.0000000;-2.0889564
1999.0000000;-0.9757686
2000.0000000;-1.5408497
2001.0000000;0.7389251
2002.0000000;-0.5869410
2003.0000000;-2.7183526
2004.0000000;-2.2065382
2005.0000000;-2.2005360
2006.0000000;-1.9308343
2007.0000000;-1.9350287
2008.0000000;-1.6304793
2009.0000000;-2.1219132
2010.0000000;-1.6896091
2011.0000000;-2.5134726
2012.0000000;-2.4806895
2013.0000000;-1.6241603
2014.0000000;-1.5723286
2015.0000000;-2.4020627