| Year | Value | | 2022 | 13,092,536 | | 2021 | 12,934,659 | | 2020 | 12,921,360 | | 2019 | 12,766,991 | | 2018 | 12,581,035 | | 2017 | 12,392,713 | | 2016 | 12,185,645 | | 2015 | 11,988,344 | | 2014 | 11,807,077 | | 2013 | 11,623,605 | | 2012 | 11,420,547 | | 2011 | 11,220,985 | | 2010 | 11,064,202 | | 2009 | 10,894,107 | | 2008 | 10,678,307 | | 2007 | 10,475,417 | | 2006 | 10,292,899 | | 2005 | 10,158,934 | | 2004 | 10,038,538 | | 2003 | 9,933,517 | | 2002 | 9,821,222 | | 2001 | 9,711,085 | | 2000 | 9,585,767 | | 1999 | 9,473,113 | | 1998 | 9,365,746 | | 1997 | 9,267,611 | | 1996 | 9,161,956 | | 1995 | 9,046,575 | | 1994 | 8,943,067 | | 1993 | 8,853,961 | | 1992 | 8,771,556 | | 1991 | 8,669,304 | | 1990 | 8,555,086 | | 1989 | 8,426,644 | | 1988 | 8,282,694 | | 1987 | 8,144,659 | | 1986 | 8,019,165 | | 1985 | 7,904,467 | | 1984 | 7,800,926 | | 1983 | 7,707,992 | | 1982 | 7,604,313 | | 1981 | 7,474,302 | | 1980 | 7,356,160 | | 1979 | 7,262,175 | | 1978 | 7,178,266 | | 1977 | 7,088,641 | | 1976 | 7,002,352 | | 1975 | 6,925,879 | | 1974 | 6,835,807 | | 1973 | 6,661,634 | | 1972 | 6,558,085 | | 1971 | 6,435,659 | | 1970 | 6,218,241 | | 1969 | 6,094,525 | | 1968 | 5,966,990 | | 1967 | 5,860,957 | | 1966 | 5,785,020 | | 1965 | 5,652,082 | | 1964 | 5,540,379 | | 1963 | 5,430,032 | | 1962 | 5,321,898 | | 1961 | 5,188,172 | | 1960 | 5,084,739 |
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