Year | Value | 2019 | 42,256,000 | 2018 | 41,717,836 | 2017 | 41,130,856 | 2016 | 40,511,232 | 2015 | 39,879,349 | 2014 | 39,237,322 | 2013 | 38,586,059 | 2012 | 37,943,455 | 2011 | 37,330,843 | 2010 | 36,762,744 | 2009 | 36,248,628 | 2008 | 35,783,883 | 2007 | 35,351,052 | 2006 | 34,924,110 | 2005 | 34,483,861 | 2004 | 34,025,331 | 2003 | 33,553,500 | 2002 | 33,071,049 | 2001 | 32,583,788 | 2000 | 32,096,147 | 1999 | 31,607,155 | 1998 | 31,114,982 | 1997 | 30,622,455 | 1996 | 30,133,317 | 1995 | 29,650,017 | 1994 | 29,173,453 | 1993 | 28,702,305 | 1992 | 28,233,979 | 1991 | 27,764,713 | 1990 | 27,291,495 | 1989 | 26,814,805 | 1988 | 26,334,828 | 1987 | 25,847,983 | 1986 | 25,349,790 | 1985 | 24,837,754 | 1984 | 24,309,910 | 1983 | 23,769,080 | 1982 | 23,223,534 | 1981 | 22,684,623 | 1980 | 22,160,655 | 1979 | 21,654,974 | 1978 | 21,165,896 | 1977 | 20,690,539 | 1976 | 20,223,860 |
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