| Year | Value | | 2022 | 3,972,960 | | 2021 | 3,939,566 | | 2020 | 3,934,988 | | 2019 | 3,850,974 | | 2018 | 3,794,407 | | 2017 | 3,752,523 | | 2016 | 3,728,666 | | 2015 | 3,746,559 | | 2014 | 3,782,105 | | 2013 | 3,827,679 | | 2012 | 3,929,952 | | 2011 | 4,090,653 | | 2010 | 4,286,218 | | 2009 | 4,574,904 | | 2008 | 4,945,655 | | 2007 | 5,264,094 | | 2006 | 5,344,342 | | 2005 | 5,161,518 | | 2004 | 4,889,759 | | 2003 | 4,615,296 | | 2002 | 4,375,299 | | 2001 | 4,331,723 | | 2000 | 4,458,319 | | 1999 | 4,473,989 | | 1998 | 4,350,191 | | 1997 | 4,220,095 | | 1996 | 4,111,067 | | 1995 | 4,038,985 | | 1994 | 4,038,977 | | 1993 | 4,070,542 | | 1992 | 4,067,364 | | 1991 | 4,021,769 | | 1990 | 3,952,346 | | 1989 | 3,885,261 | | 1988 | 3,818,224 | | 1987 | 3,745,298 | | 1986 | 3,673,545 | | 1985 | 3,607,419 | | 1984 | 3,531,583 | | 1983 | 3,442,645 | | 1982 | 3,344,458 | | 1981 | 3,231,182 | | 1980 | 3,122,145 | | 1979 | 3,007,646 | | 1978 | 2,875,936 | | 1977 | 2,760,166 | | 1976 | 2,672,436 | | 1975 | 2,588,839 | | 1974 | 2,530,686 | | 1973 | 2,512,020 | | 1972 | 2,490,757 | | 1971 | 2,457,980 | | 1970 | 2,393,573 | | 1969 | 2,349,246 | | 1968 | 2,299,360 | | 1967 | 2,242,719 | | 1966 | 2,158,951 | | 1965 | 2,067,787 | | 1964 | 1,982,394 | | 1963 | 1,907,044 | | 1962 | 1,853,660 | | 1961 | 1,831,977 | | 1960 | 1,824,381 |
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