| Year | Value | | 2023 | 4,290,049 | | 2022 | 4,343,714 | | 2021 | 4,381,941 | | 2020 | 4,400,904 | | 2019 | 4,407,577 | | 2018 | 4,405,307 | | 2017 | 4,400,516 | | 2016 | 4,388,966 | | 2015 | 4,369,801 | | 2014 | 4,345,898 | | 2013 | 4,318,074 | | 2012 | 4,286,937 | | 2011 | 4,252,916 | | 2010 | 4,218,775 | | 2009 | 4,188,204 | | 2008 | 4,119,674 | | 2007 | 4,051,232 | | 2006 | 4,022,610 | | 2005 | 3,995,444 | | 2004 | 3,971,421 | | 2003 | 3,953,356 | | 2002 | 3,939,942 | | 2001 | 3,926,875 | | 2000 | 3,912,746 | | 1999 | 3,896,779 | | 1998 | 3,855,372 | | 1997 | 3,794,654 | | 1996 | 3,734,314 | | 1995 | 3,672,897 | | 1994 | 3,607,222 | | 1993 | 3,535,747 | | 1992 | 3,459,819 | | 1991 | 3,385,445 | | 1990 | 3,318,602 | | 1989 | 3,251,179 | | 1988 | 3,201,760 | | 1987 | 3,169,880 | | 1986 | 3,134,852 | | 1985 | 3,101,753 | | 1984 | 3,067,252 | | 1983 | 3,027,127 | | 1982 | 2,986,904 | | 1981 | 2,947,588 | | 1980 | 2,909,173 | | 1979 | 2,874,457 | | 1978 | 2,839,149 | | 1977 | 2,803,276 | | 1976 | 2,769,330 | | 1975 | 2,736,604 | | 1974 | 2,702,062 |
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