1967.0000000;-0.3495380
1968.0000000;-0.9323013
1969.0000000;-1.4610860
1970.0000000;-0.8611938
1971.0000000;-2.0094666
1972.0000000;-0.9450371
1973.0000000;-1.5586183
1974.0000000;-1.0401235
1975.0000000;-0.7560294
1976.0000000;-1.6712803
1977.0000000;0.1979774
1978.0000000;0.4445003
1979.0000000;-0.1250463
1980.0000000;0.7910008
1981.0000000;0.1754235
1982.0000000;-0.1772921
1983.0000000;-0.1136422
1984.0000000;0.9293135
1985.0000000;0.4439791
1986.0000000;-1.7370393
1987.0000000;0.0215991
1988.0000000;0.2205440
1989.0000000;-1.5938196
1990.0000000;-1.7040131
1991.0000000;-1.7113702
1992.0000000;-1.1396927
1993.0000000;-0.6854672
1994.0000000;-1.2618433
1995.0000000;0.9962325
1996.0000000;-0.6401575
1997.0000000;-1.1729088
1998.0000000;-1.9901792
1999.0000000;-0.7997879
2000.0000000;-1.8809283
2001.0000000;0.2241142
2002.0000000;-1.8614616
2003.0000000;-3.5985651
2004.0000000;-1.9603407
2005.0000000;-2.5163469
2006.0000000;-1.5738025
2007.0000000;-1.5239081
2008.0000000;-1.8722030
2009.0000000;-3.3589363
2010.0000000;-0.9145544
2011.0000000;-3.2892179
2012.0000000;-2.8662550
2013.0000000;-1.4913028
2014.0000000;-1.1653287
2015.0000000;-2.6807818