Date,Value
Sep 30 2018,3.00
Dec 31 2017,2.47
Dec 31 2016,1.88
Dec 31 2015,2.00
Dec 31 2014,2.70
Dec 31 2013,2.61
Dec 31 2012,1.47
Dec 31 2011,1.61
Dec 31 2010,2.57
Dec 31 2009,0.18
Dec 31 2008,-2.75
Dec 31 2007,1.97
Dec 31 2006,2.59
Dec 31 2005,3.13
Dec 31 2004,3.28
Dec 31 2003,4.33
Dec 31 2002,2.09
Dec 31 2001,0.15
Dec 31 2000,2.97
Dec 31 1999,4.81
Dec 31 1998,4.88
Dec 31 1997,4.49
Dec 31 1996,4.42
Dec 31 1995,2.20
Dec 31 1994,4.12
Dec 31 1993,2.61
Dec 31 1992,4.38
Dec 31 1991,1.17
Dec 31 1990,0.60
Dec 31 1989,2.74
Dec 31 1988,3.80
Dec 31 1987,4.48
Dec 31 1986,2.91
Dec 31 1985,4.18
Dec 31 1984,5.58
Dec 31 1983,7.90
Dec 31 1982,-1.44
Dec 31 1981,1.30
Dec 31 1980,-0.04
Dec 31 1979,1.28
Dec 31 1978,6.66
Dec 31 1977,5.01
Dec 31 1976,4.31
Dec 31 1975,2.55
Dec 31 1974,-1.95
Dec 31 1973,4.02
Dec 31 1972,6.90
Dec 31 1971,4.37
Dec 31 1970,-0.17