| Year | Value | | 2019 | 54,258,497.620205 | | 2018 | 53,400,215.36541 | | 2016 | 51,705,282 | | 2015 | 43,818,107 | | 2013 | 34,877,522 | | 2012 | 34,532,854.874824 | | 2011 | 31,467,772.898414 | | 2010 | 29,535,977.742387 | | 1999 | 11,464,000 | | 1998 | 10,360,700 | | 1997 | 9,670,100 | | 1996 | 9,287,800 | | 1995 | 8,905,500 | | 1994 | 8,573,000 | | 1993 | 7,255,400 | | 1992 | 6,772,500 | | 1991 | 6,502,100 | | 1990 | 5,798,000 | | 1989 | 5,397,300 | | 1988 | 5,273,200 | | 1987 | 4,970,300 |
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