| Year | Value | | 2022 | 12,224,110 | | 2021 | 12,079,472 | | 2020 | 11,936,162 | | 2019 | 11,777,315 | | 2018 | 11,606,905 | | 2017 | 11,435,533 | | 2016 | 11,263,015 | | 2015 | 11,090,085 | | 2014 | 10,916,987 | | 2013 | 10,743,349 | | 2012 | 10,569,697 | | 2011 | 10,396,246 | | 2010 | 10,223,270 | | 2009 | 10,051,317 | | 2008 | 9,880,593 | | 2007 | 9,711,152 | | 2006 | 9,542,663 | | 2005 | 9,377,388 | | 2004 | 9,216,279 | | 2003 | 9,057,378 | | 2002 | 8,900,583 | | 2001 | 8,746,084 | | 2000 | 8,592,656 | | 1999 | 8,439,052 | | 1998 | 8,286,928 | | 1997 | 8,137,619 | | 1996 | 7,989,367 | | 1995 | 7,841,471 | | 1994 | 7,693,722 | | 1993 | 7,544,489 | | 1992 | 7,394,419 | | 1991 | 7,244,891 | | 1990 | 7,096,194 | | 1989 | 6,949,139 | | 1988 | 6,804,072 | | 1987 | 6,661,434 | | 1986 | 6,521,983 | | 1985 | 6,385,630 | | 1984 | 6,251,926 | | 1983 | 6,120,620 | | 1982 | 5,991,118 | | 1981 | 5,862,990 | | 1980 | 5,736,088 | | 1979 | 5,610,380 | | 1978 | 5,486,132 | | 1977 | 5,363,917 | | 1976 | 5,244,355 | | 1975 | 5,127,776 | | 1974 | 5,013,765 | | 1973 | 4,902,248 | | 1972 | 4,793,804 | | 1971 | 4,688,267 | | 1970 | 4,585,693 | | 1969 | 4,486,098 | | 1968 | 4,389,249 | | 1967 | 4,295,269 | | 1966 | 4,204,065 | | 1965 | 4,115,511 | | 1964 | 4,029,472 | | 1963 | 3,945,729 | | 1962 | 3,864,140 | | 1961 | 3,784,744 | | 1960 | 3,707,515 |
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