Year | Value | 2021 | 392,102.214 | 2020 | 277,588.159 | 2019 | 550,457.89262858 | 2018 | 587,653.03075283 | 2017 | 959,738 | 2016 | 416,033 | 2015 | 476,353 | 2014 | 456,228 | 2013 | 456,000 | 2012 | 471,536.20461493 | 2011 | 252,408.17955984 | 2010 | 210,913 | 2001 | 95,200 | 1994 | 177,600 | 1993 | 83,700 | 1992 | 116,400 | 1991 | 150,400 | 1990 | 206,700 | 1989 | 202,600 | 1988 | 216,200 | 1987 | 200,800 | 1986 | 168,900 | 1985 | 131,500 | 1984 | 338,000 | 1983 | 330,700 | 1982 | 377,700 | 1981 | 492,600 | 1980 | 439,200 | 1979 | 577,700 | 1978 | 569,900 | 1977 | 488,100 | 1976 | 462,800 | 1975 | 445,000 | 1974 | 464,100 | 1973 | 363,700 | 1972 | 327,800 | 1971 | 325,900 | 1970 | 305,000 |
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