| Year | Value | | 2022 | 6,257,745 | | 2021 | 6,205,901 | | 2020 | 6,148,895 | | 2019 | 6,086,590 | | 2018 | 6,023,338 | | 2017 | 5,957,666 | | 2016 | 5,890,057 | | 2015 | 5,821,555 | | 2014 | 5,752,827 | | 2013 | 5,684,301 | | 2012 | 5,617,270 | | 2011 | 5,543,870 | | 2010 | 5,472,893 | | 2009 | 5,414,120 | | 2008 | 5,358,773 | | 2007 | 5,305,565 | | 2006 | 5,253,882 | | 2005 | 5,203,104 | | 2004 | 5,150,557 | | 2003 | 5,095,996 | | 2002 | 5,041,762 | | 2001 | 4,987,785 | | 2000 | 4,932,858 | | 1999 | 4,876,303 | | 1998 | 4,817,059 | | 1997 | 4,754,088 | | 1996 | 4,687,547 | | 1995 | 4,617,057 | | 1994 | 4,540,824 | | 1993 | 4,458,141 | | 1992 | 4,371,046 | | 1991 | 4,281,433 | | 1990 | 4,190,262 | | 1989 | 4,098,793 | | 1988 | 4,005,424 | | 1987 | 3,908,522 | | 1986 | 3,809,281 | | 1985 | 3,709,581 | | 1984 | 3,610,264 | | 1983 | 3,516,225 | | 1982 | 3,430,162 | | 1981 | 3,347,559 | | 1980 | 3,267,597 | | 1979 | 3,189,802 | | 1978 | 3,112,605 | | 1977 | 3,035,470 | | 1976 | 2,958,099 | | 1975 | 2,879,258 | | 1974 | 2,800,524 | | 1973 | 2,724,827 | | 1972 | 2,651,928 | | 1971 | 2,581,443 | | 1970 | 2,512,624 | | 1969 | 2,444,959 | | 1968 | 2,378,167 | | 1967 | 2,313,804 | | 1966 | 2,253,777 | | 1965 | 2,206,465 | | 1964 | 2,174,441 | | 1963 | 2,148,388 | | 1962 | 2,125,136 | | 1961 | 2,104,744 | | 1960 | 2,086,704 |
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