| Year | Value | | 2022 | 6,812,341 | | 2021 | 6,735,277 | | 2020 | 6,653,942 | | 2019 | 6,569,088 | | 2018 | 6,477,793 | | 2017 | 6,378,261 | | 2016 | 6,282,196 | | 2015 | 6,192,235 | | 2014 | 6,097,764 | | 2013 | 5,985,221 | | 2012 | 5,869,870 | | 2011 | 6,188,132 | | 2010 | 6,491,988 | | 2009 | 6,360,191 | | 2008 | 6,228,370 | | 2007 | 6,097,177 | | 2006 | 5,973,369 | | 2005 | 5,837,986 | | 2004 | 5,687,563 | | 2003 | 5,542,641 | | 2002 | 5,405,326 | | 2001 | 5,275,916 | | 2000 | 5,154,790 | | 1999 | 5,057,998 | | 1998 | 4,980,962 | | 1997 | 4,902,346 | | 1996 | 4,820,066 | | 1995 | 4,733,063 | | 1994 | 4,641,296 | | 1993 | 4,544,970 | | 1992 | 4,444,820 | | 1991 | 4,341,971 | | 1990 | 4,236,983 | | 1989 | 4,130,042 | | 1988 | 4,021,565 | | 1987 | 3,911,939 | | 1986 | 3,800,110 | | 1985 | 3,684,313 | | 1984 | 3,564,547 | | 1983 | 3,423,592 | | 1982 | 3,265,457 | | 1981 | 3,112,015 | | 1980 | 2,962,720 | | 1979 | 2,816,917 | | 1978 | 2,676,117 | | 1977 | 2,541,805 | | 1976 | 2,413,760 | | 1975 | 2,291,841 | | 1974 | 2,179,446 | | 1973 | 2,084,256 | | 1972 | 2,012,796 | | 1971 | 1,958,320 | | 1970 | 1,909,177 | | 1969 | 1,862,823 | | 1968 | 1,819,393 | | 1967 | 1,778,578 | | 1966 | 1,739,831 | | 1965 | 1,700,072 | | 1964 | 1,652,102 | | 1963 | 1,594,758 | | 1962 | 1,535,157 | | 1961 | 1,478,760 | | 1960 | 1,426,986 |
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