| Year | Value | | 2022 | 10,588,183 | | 2021 | 10,410,831 | | 2020 | 10,304,440 | | 2019 | 10,234,848 | | 2018 | 10,214,399 | | 2017 | 10,171,689 | | 2016 | 10,073,810 | | 2015 | 9,800,206 | | 2014 | 9,436,914 | | 2013 | 9,117,247 | | 2012 | 8,783,082 | | 2011 | 8,534,354 | | 2010 | 8,622,792 | | 2009 | 8,802,696 | | 2008 | 8,887,248 | | 2007 | 8,975,183 | | 2006 | 9,044,208 | | 2005 | 8,997,553 | | 2004 | 8,882,224 | | 2003 | 8,755,429 | | 2002 | 8,640,700 | | 2001 | 8,555,703 | | 2000 | 8,506,211 | | 1999 | 8,478,052 | | 1998 | 8,486,541 | | 1997 | 8,518,731 | | 1996 | 8,527,682 | | 1995 | 8,514,844 | | 1994 | 8,498,544 | | 1993 | 8,500,062 | | 1992 | 8,514,817 | | 1991 | 8,545,207 | | 1990 | 8,554,975 | | 1989 | 8,360,369 | | 1988 | 7,845,962 | | 1987 | 7,191,301 | | 1986 | 6,535,090 | | 1985 | 6,007,928 | | 1984 | 5,940,727 | | 1983 | 6,366,546 | | 1982 | 6,963,716 | | 1981 | 7,512,166 | | 1980 | 7,893,899 | | 1979 | 8,044,864 | | 1978 | 8,036,043 | | 1977 | 7,983,865 | | 1976 | 7,934,736 | | 1975 | 7,872,295 | | 1974 | 7,773,640 | | 1973 | 7,660,127 | | 1972 | 7,551,439 | | 1971 | 7,450,929 | | 1970 | 7,360,612 | | 1969 | 7,246,161 | | 1968 | 7,099,466 | | 1967 | 6,953,618 | | 1966 | 6,809,852 | | 1965 | 6,650,035 | | 1964 | 6,496,430 | | 1963 | 6,379,002 | | 1962 | 6,244,057 | | 1961 | 6,081,780 | | 1960 | 5,922,414 |
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