| Year | Value | | 2022 | 9,350,700 | | 2021 | 8,761,900 | | 2020 | 8,444,800 | | 2019 | 9,034,300 | | 2018 | 8,568,400 | | 2017 | 8,381,900 | | 2016 | 8,460,700 | | 2015 | 8,233,100 | | 2014 | 8,103,800 | | 2013 | 8,438,100 | | 2012 | 8,067,600 | | 2011 | 7,794,300 | | 2010 | 7,384,600 | | 2009 | 6,884,800 | | 2008 | 6,414,800 | | 2007 | 5,924,100 | | 2006 | 4,788,600 | | 2005 | 4,384,600 | | 2004 | 3,990,700 | | 2003 | 3,577,000 | | 2002 | 3,313,000 | | 2001 | 2,991,600 | | 2000 | 2,747,400 | | 1999 | 1,630,800 | | 1998 | 1,094,700 | | 1997 | 848,600 | | 1996 | 431,010 | | 1995 | 306,000 | | 1994 | 235,630 | | 1993 | 179,000 | | 1992 | 120,000 | | 1991 | 81,906 | | 1990 | 51,728 | | 1989 | 26,295 | | 1988 | 10,827 |
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