| Year | Value | | 2021 | 1,766.181 | | 2020 | 25,217.454 | | 2019 | 107,350 | | 2018 | 145,795 | | 2017 | 155,524 | | 2016 | 111,830 | | 2015 | 93,129 | | 2014 | 69,768 | | 2013 | 78,264 | | 2012 | 288,013.90082569 | | 2011 | 326,146.20615 | | 2010 | 313,892 | | 1998 | 506,400 | | 1997 | 508,400 | | 1996 | 300,000 | | 1995 | 300,000 | | 1994 | 252,000 | | 1993 | 240,000 | | 1992 | 230,000 | | 1991 | 165,000 | | 1990 | 156,000 | | 1989 | 110,200 | | 1988 | 98,900 | | 1987 | 114,800 | | 1986 | 103,100 | | 1985 | 108,400 | | 1984 | 124,000 | | 1983 | 99,500 | | 1982 | 114,600 | | 1981 | 124,400 | | 1980 | 118,900 | | 1979 | 156,300 | | 1978 | 136,300 | | 1977 | 137,800 | | 1976 | 119,000 | | 1975 | 113,500 | | 1974 | 88,800 | | 1973 | 43,000 | | 1972 | 98,000 | | 1971 | 101,100 | | 1970 | 112,500 |
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