Year | Value | 2022 | 28,985,877 | 2021 | 28,687,759 | 2020 | 27,937,113 | 2019 | 26,858,951 | 2018 | 25,718,309 | 2017 | 24,493,123 | 2016 | 23,396,332 | 2015 | 22,894,806 | 2014 | 22,647,072 | 2013 | 22,143,979 | 2012 | 21,648,782 | 2011 | 21,304,925 | 2010 | 20,948,159 | 2009 | 20,476,853 | 2008 | 20,092,934 | 2007 | 19,749,585 | 2006 | 19,419,527 | 2005 | 19,170,140 | 2004 | 19,061,445 | 2003 | 18,926,325 | 2002 | 18,713,854 | 2001 | 18,429,669 | 2000 | 17,994,290 | 1999 | 17,424,692 | 1998 | 16,937,207 | 1997 | 16,539,356 | 1996 | 16,111,200 | 1995 | 15,795,156 | 1994 | 15,449,866 | 1993 | 14,737,234 | 1992 | 13,852,646 | 1991 | 13,084,888 | 1990 | 12,399,294 | 1989 | 12,062,537 | 1988 | 12,231,897 | 1987 | 12,651,082 | 1986 | 13,030,524 | 1985 | 13,277,047 | 1984 | 13,328,636 | 1983 | 13,227,487 | 1982 | 13,058,724 | 1981 | 12,832,866 | 1980 | 12,601,764 | 1979 | 12,344,058 | 1978 | 12,040,823 | 1977 | 11,774,252 | 1976 | 11,557,084 | 1975 | 11,334,545 | 1974 | 11,086,925 | 1973 | 10,844,254 | 1972 | 10,544,405 | 1971 | 10,207,546 | 1970 | 9,891,229 | 1969 | 9,627,565 | 1968 | 9,383,788 | 1967 | 9,139,859 | 1966 | 8,938,641 | 1965 | 8,781,689 | 1964 | 8,654,854 | 1963 | 8,569,759 | 1962 | 8,510,998 | 1961 | 8,409,087 | 1960 | 8,279,214 |
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