Year | Value | 2022 | 40,421,592 | 2021 | 40,291,459 | 2020 | 40,339,398 | 2019 | 40,218,079 | 2018 | 40,132,692 | 2017 | 40,148,167 | 2016 | 40,300,322 | 2015 | 40,536,303 | 2014 | 40,781,830 | 2013 | 40,896,071 | 2012 | 40,865,676 | 2011 | 40,753,361 | 2010 | 40,632,284 | 2009 | 40,488,966 | 2008 | 40,435,439 | 2007 | 40,480,102 | 2006 | 40,726,504 | 2005 | 41,091,353 | 2004 | 41,394,481 | 2003 | 41,579,628 | 2002 | 41,676,550 | 2001 | 41,519,415 | 2000 | 41,326,862 | 1999 | 41,388,028 | 1998 | 41,535,109 | 1997 | 41,601,644 | 1996 | 41,728,570 | 1995 | 41,820,042 | 1994 | 41,645,952 | 1993 | 41,329,098 | 1992 | 40,961,494 | 1991 | 40,525,735 | 1990 | 40,061,294 | 1989 | 39,624,717 | 1988 | 39,112,830 | 1987 | 38,614,450 | 1986 | 38,315,500 | 1985 | 37,951,811 | 1984 | 37,461,550 | 1983 | 37,271,257 | 1982 | 37,316,539 | 1981 | 36,890,197 | 1980 | 35,778,880 | 1979 | 34,598,417 | 1978 | 33,408,906 | 1977 | 32,015,272 | 1976 | 30,818,564 | 1975 | 30,408,133 | 1974 | 30,223,951 | 1973 | 29,753,875 | 1972 | 29,302,223 | 1971 | 29,021,812 | 1970 | 28,706,179 | 1969 | 28,407,258 | 1968 | 28,140,148 | 1967 | 27,929,661 | 1966 | 27,754,899 | 1965 | 27,653,981 | 1964 | 27,704,131 | 1963 | 27,781,392 | 1962 | 27,827,731 | 1961 | 27,913,990 | 1960 | 27,978,758 |
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