Year | Value | 2014 | 28,332 | 2013 | 28,080 | 2012 | 52,041.6 | 2011 | 74,653.8 | 2010 | 48,519.199657971 | 2001 | 46,364 | 2000 | 77,273 | 1999 | 83,900 | 1998 | 98,000 | 1997 | 93,000 | 1996 | 93,100 | 1995 | 92,100 | 1994 | 86,300 | 1993 | 85,200 | 1992 | 83,400 | 1991 | 83,400 | 1990 | 93,300 | 1989 | 91,100 | 1988 | 86,400 | 1987 | 86,600 | 1986 | 104,500 | 1985 | 93,500 | 1984 | 87,700 | 1983 | 84,500 | 1982 | 82,800 | 1981 | 80,100 | 1980 | 106,100 | 1979 | 96,300 | 1978 | 90,200 | 1977 | 79,400 | 1976 | 72,400 | 1975 | 65,500 | 1974 | 59,500 | 1973 | 55,100 | 1972 | 50,900 | 1971 | 55,000 | 1970 | 55,400 |
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