| Year | Value | | 2022 | 37,488,685 | | 2021 | 38,304,232 | | 2020 | 36,242,073 | | 2019 | 35,747,374 | | 2018 | 35,671,986 | | 2017 | 35,849,235 | | 2016 | 35,704,070 | | 2015 | 34,343,836 | | 2014 | 32,922,099 | | 2013 | 30,369,067 | | 2012 | 27,837,490 | | 2011 | 25,443,438 | | 2010 | 22,540,075 | | 2009 | 19,719,764 | | 2008 | 17,097,907 | | 2007 | 14,119,739 | | 2006 | 11,038,288 | | 2005 | 8,895,921 | | 2004 | 7,145,973 | | 2003 | 5,240,812 | | 2002 | 4,255,926 | | 2001 | 3,222,925 | | 2000 | 2,263,698 | | 1999 | 1,334,724 | | 1998 | 834,912 | | 1997 | 545,405 | | 1996 | 354,120 | | 1995 | 221,596 | | 1994 | 121,828 | | 1993 | 76,168 | | 1992 | 53,303 | | 1991 | 37,806 | | 1990 | 26,096 | | 1989 | 13,492 | | 1988 | 9,573 | | 1987 | 6,720 | | 1986 | 3,260 |
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