| Year | Value | | 2022 | 4,332,410 | | 2021 | 4,215,009 | | 2020 | 4,102,114 | | 2019 | 3,995,242 | | 2018 | 3,891,676 | | 2017 | 3,799,744 | | 2016 | 3,721,551 | | 2015 | 3,654,897 | | 2014 | 3,606,328 | | 2013 | 3,565,627 | | 2012 | 3,514,413 | | 2011 | 3,450,407 | | 2010 | 3,374,328 | | 2009 | 3,286,610 | | 2008 | 3,191,917 | | 2007 | 3,108,115 | | 2006 | 3,047,672 | | 2005 | 3,006,280 | | 2004 | 2,975,115 | | 2003 | 2,937,939 | | 2002 | 2,885,462 | | 2001 | 2,820,421 | | 2000 | 2,752,535 | | 1999 | 2,689,151 | | 1998 | 2,627,624 | | 1997 | 2,564,257 | | 1996 | 2,499,708 | | 1995 | 2,437,908 | | 1994 | 2,381,912 | | 1993 | 2,327,297 | | 1992 | 2,269,272 | | 1991 | 2,205,052 | | 1990 | 2,135,907 | | 1989 | 2,071,726 | | 1988 | 2,014,597 | | 1987 | 1,957,940 | | 1986 | 1,898,991 | | 1985 | 1,834,689 | | 1984 | 1,763,819 | | 1983 | 1,688,524 | | 1982 | 1,611,289 | | 1981 | 1,535,089 | | 1980 | 1,462,690 | | 1979 | 1,395,466 | | 1978 | 1,335,180 | | 1977 | 1,282,802 | | 1976 | 1,237,468 | | 1975 | 1,201,222 | | 1974 | 1,176,438 | | 1973 | 1,155,925 | | 1972 | 1,133,010 | | 1971 | 1,108,348 | | 1970 | 1,084,587 | | 1969 | 1,065,123 | | 1968 | 1,046,646 | | 1967 | 1,024,854 | | 1966 | 1,000,429 | | 1965 | 973,584 | | 1964 | 943,445 | | 1963 | 910,565 | | 1962 | 877,563 | | 1961 | 846,689 | | 1960 | 818,805 |
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