| Year | Value | | 2022 | 3,401,568 | | 2021 | 3,448,042 | | 2020 | 3,471,502 | | 2019 | 3,494,492 | | 2018 | 3,494,816 | | 2017 | 3,487,288 | | 2016 | 3,462,040 | | 2015 | 3,425,186 | | 2014 | 3,388,405 | | 2013 | 3,355,031 | | 2012 | 3,337,975 | | 2011 | 3,327,868 | | 2010 | 3,313,922 | | 2009 | 3,295,326 | | 2008 | 3,278,416 | | 2007 | 3,266,545 | | 2006 | 3,269,607 | | 2005 | 3,253,617 | | 2004 | 3,232,923 | | 2003 | 3,208,236 | | 2002 | 3,178,925 | | 2001 | 3,149,721 | | 2000 | 3,113,300 | | 1999 | 3,066,914 | | 1998 | 3,022,527 | | 1997 | 2,984,710 | | 1996 | 2,941,397 | | 1995 | 2,893,624 | | 1994 | 2,845,545 | | 1993 | 2,847,016 | | 1992 | 2,846,017 | | 1991 | 2,803,458 | | 1990 | 2,780,817 | | 1989 | 2,766,421 | | 1988 | 2,694,121 | | 1987 | 2,602,275 | | 1986 | 2,542,550 | | 1985 | 2,459,709 | | 1984 | 2,352,014 | | 1983 | 2,226,176 | | 1982 | 2,117,229 | | 1981 | 2,035,368 | | 1980 | 1,960,804 | | 1979 | 1,900,623 | | 1978 | 1,902,597 | | 1977 | 1,875,690 | | 1976 | 1,800,307 | | 1975 | 1,758,342 | | 1974 | 1,720,168 | | 1973 | 1,635,903 | | 1972 | 1,572,923 | | 1971 | 1,549,547 | | 1970 | 1,488,379 | | 1969 | 1,416,767 | | 1968 | 1,368,293 | | 1967 | 1,338,322 | | 1966 | 1,310,010 | | 1965 | 1,284,115 | | 1964 | 1,258,817 | | 1963 | 1,240,907 | | 1962 | 1,221,400 | | 1961 | 1,200,781 | | 1960 | 1,180,155 |
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