Year | Value | 2018 | 242,734.92913874 | 2017 | 250,510 | 2016 | 245,933 | 2015 | 247,773 | 2014 | 252,495 | 2013 | 198,637 | 2012 | 171,025.62631028 | 2011 | 147,475.43842305 | 2010 | 126,300 | 2009 | 92,285 | 2008 | 104,600 | 2007 | 104,274 | 2006 | 99,817 | 2005 | 101,132 | 2004 | 100,958 | 2003 | 137,727 | 2002 | 137,987 | 2001 | 155,940 | 2000 | 138,632 | 1999 | 148,100 | 1998 | 114,300 | 1997 | 112,900 | 1996 | 137,200 | 1995 | 149,500 | 1994 | 144,800 | 1993 | 139,300 | 1992 | 134,300 | 1991 | 137,200 | 1990 | 126,300 | 1989 | 131,800 | 1988 | 133,000 | 1987 | 133,600 | 1986 | 136,300 | 1985 | 134,100 | 1984 | 113,900 | 1983 | 111,600 | 1982 | 99,200 | 1981 | 72,600 | 1980 | 76,400 | 1979 | 72,100 | 1978 | 54,200 | 1977 | 55,300 | 1976 | 60,300 | 1975 | 45,500 | 1974 | 28,800 | 1973 | 27,400 | 1972 | 35,300 | 1971 | 34,100 | 1970 | 35,100 |
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