Year | Value | 2022 | 32,245,379 | 2021 | 31,903,233 | 2020 | 30,957,338 | 2019 | 29,744,624 | 2018 | 28,558,049 | 2017 | 27,243,717 | 2016 | 26,140,213 | 2015 | 25,737,943 | 2014 | 25,575,078 | 2013 | 25,147,642 | 2012 | 24,752,841 | 2011 | 24,490,738 | 2010 | 24,231,921 | 2009 | 23,889,655 | 2008 | 23,586,135 | 2007 | 23,305,862 | 2006 | 23,058,264 | 2005 | 22,850,040 | 2004 | 22,744,266 | 2003 | 22,676,262 | 2002 | 22,586,254 | 2001 | 22,504,099 | 2000 | 22,389,811 | 1999 | 22,180,200 | 1998 | 22,085,352 | 1997 | 22,051,669 | 1996 | 21,882,187 | 1995 | 21,721,835 | 1994 | 21,370,317 | 1993 | 20,395,303 | 1992 | 19,130,138 | 1991 | 18,019,672 | 1990 | 17,068,476 | 1989 | 16,684,303 | 1988 | 17,073,669 | 1987 | 17,809,940 | 1986 | 18,457,385 | 1985 | 18,859,573 | 1984 | 18,926,449 | 1983 | 18,748,058 | 1982 | 18,454,403 | 1981 | 18,063,890 | 1980 | 17,659,404 | 1979 | 17,218,326 | 1978 | 16,727,858 | 1977 | 16,310,644 | 1976 | 15,984,656 | 1975 | 15,693,449 | 1974 | 15,398,790 | 1973 | 15,117,176 | 1972 | 14,789,142 | 1971 | 14,436,860 | 1970 | 14,095,059 | 1969 | 13,787,632 | 1968 | 13,473,303 | 1967 | 13,110,376 | 1966 | 12,761,289 | 1965 | 12,439,864 | 1964 | 12,143,785 | 1963 | 11,903,229 | 1962 | 11,705,155 | 1961 | 11,467,182 | 1960 | 11,200,635 |
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