Year | Value | 2022 | 18,965,399 | 2021 | 19,096,392 | 2020 | 19,196,477 | 2019 | 19,252,374 | 2018 | 19,291,920 | 2017 | 19,342,973 | 2016 | 19,555,396 | 2015 | 19,652,884 | 2014 | 19,531,882 | 2013 | 19,506,020 | 2012 | 19,519,108 | 2011 | 19,537,236 | 2010 | 19,565,379 | 2009 | 19,605,061 | 2008 | 19,642,795 | 2007 | 19,690,462 | 2006 | 19,758,594 | 2005 | 19,834,298 | 2004 | 19,911,388 | 2003 | 19,989,156 | 2002 | 20,066,451 | 2001 | 20,134,972 | 2000 | 20,180,731 | 1999 | 20,209,901 | 1998 | 20,207,050 | 1997 | 20,174,942 | 1996 | 20,112,460 | 1995 | 20,019,826 | 1994 | 19,901,541 | 1993 | 19,765,399 | 1992 | 19,611,686 | 1991 | 19,410,614 | 1990 | 19,126,479 | 1989 | 18,752,378 | 1988 | 18,333,458 | 1987 | 17,901,103 | 1986 | 17,472,051 | 1985 | 17,088,451 | 1984 | 16,682,950 | 1983 | 16,276,095 | 1982 | 15,897,127 | 1981 | 15,542,257 | 1980 | 15,195,825 | 1979 | 14,822,295 | 1978 | 14,449,835 | 1977 | 14,081,628 | 1976 | 13,725,004 | 1975 | 13,376,443 | 1974 | 13,027,761 | 1973 | 12,681,589 | 1972 | 12,340,050 | 1971 | 12,006,521 | 1970 | 11,674,243 | 1969 | 11,350,436 | 1968 | 11,032,588 | 1967 | 10,720,504 | 1966 | 10,416,940 | 1965 | 10,121,629 | 1964 | 9,834,713 | 1963 | 9,558,766 | 1962 | 9,293,113 | 1961 | 9,039,584 | 1960 | 8,818,777 |
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