Year | Value | 2022 | 23,416,745 | 2021 | 23,236,858 | 2020 | 23,213,643 | 2019 | 23,104,636 | 2018 | 22,946,018 | 2017 | 22,858,897 | 2016 | 22,821,680 | 2015 | 22,817,982 | 2014 | 22,853,324 | 2013 | 22,948,775 | 2012 | 23,059,451 | 2011 | 23,074,622 | 2010 | 23,014,206 | 2009 | 22,927,127 | 2008 | 22,729,625 | 2007 | 22,347,342 | 2006 | 21,909,832 | 2005 | 21,516,423 | 2004 | 21,117,720 | 2003 | 20,720,462 | 2002 | 20,315,259 | 2001 | 20,010,746 | 2000 | 19,870,967 | 1999 | 19,780,445 | 1998 | 19,698,974 | 1997 | 19,616,079 | 1996 | 19,533,321 | 1995 | 19,451,716 | 1994 | 19,365,015 | 1993 | 19,271,068 | 1992 | 19,169,415 | 1991 | 19,074,789 | 1990 | 19,032,084 | 1989 | 19,023,375 | 1988 | 19,001,998 | 1987 | 18,968,186 | 1986 | 18,923,648 | 1985 | 18,870,943 | 1984 | 18,805,529 | 1983 | 18,728,826 | 1982 | 18,637,604 | 1981 | 18,524,345 | 1980 | 18,389,957 | 1979 | 18,238,490 | 1978 | 18,072,198 | 1977 | 17,891,568 | 1976 | 17,700,851 | 1975 | 17,506,430 | 1974 | 17,298,782 | 1973 | 17,091,766 | 1972 | 16,895,555 | 1971 | 16,703,109 | 1970 | 16,495,603 | 1969 | 16,306,622 | 1968 | 16,141,347 | 1967 | 15,925,732 | 1966 | 15,724,828 | 1965 | 15,557,504 | 1964 | 15,382,294 | 1963 | 15,223,155 | 1962 | 15,082,607 | 1961 | 14,936,927 | 1960 | 14,789,308 |
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