| Year | Value | | 2022 | 13,859,341 | | 2021 | 13,531,906 | | 2020 | 13,205,153 | | 2019 | 12,877,539 | | 2018 | 12,554,864 | | 2017 | 12,240,789 | | 2016 | 11,930,985 | | 2015 | 11,625,998 | | 2014 | 11,333,365 | | 2013 | 11,055,430 | | 2012 | 10,788,692 | | 2011 | 10,527,712 | | 2010 | 10,270,728 | | 2009 | 10,021,323 | | 2008 | 9,779,785 | | 2007 | 9,547,082 | | 2006 | 9,330,625 | | 2005 | 9,140,114 | | 2004 | 8,961,039 | | 2003 | 8,772,254 | | 2002 | 8,577,790 | | 2001 | 8,445,717 | | 2000 | 8,336,967 | | 1999 | 8,174,897 | | 1998 | 7,992,545 | | 1997 | 7,842,806 | | 1996 | 7,683,115 | | 1995 | 7,468,347 | | 1994 | 7,262,112 | | 1993 | 7,046,097 | | 1992 | 6,832,195 | | 1991 | 6,615,734 | | 1990 | 6,354,145 | | 1989 | 6,136,166 | | 1988 | 5,977,175 | | 1987 | 5,820,774 | | 1986 | 5,671,380 | | 1985 | 5,531,661 | | 1984 | 5,402,084 | | 1983 | 5,282,274 | | 1982 | 5,170,731 | | 1981 | 5,067,427 | | 1980 | 4,972,609 | | 1979 | 4,885,199 | | 1978 | 4,804,926 | | 1977 | 4,730,375 | | 1976 | 4,658,743 | | 1975 | 4,588,006 | | 1974 | 4,517,073 | | 1973 | 4,445,207 | | 1972 | 4,372,212 | | 1971 | 4,298,087 | | 1970 | 4,222,374 | | 1969 | 4,145,194 | | 1968 | 4,067,333 | | 1967 | 3,990,760 | | 1966 | 3,916,780 | | 1965 | 3,845,074 | | 1964 | 3,775,510 | | 1963 | 3,707,945 | | 1962 | 3,642,324 | | 1961 | 3,578,631 | | 1960 | 3,516,814 |
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