Year | Value | 2022 | 32,952,796 | 2021 | 33,660,424 | 2020 | 34,187,126 | 2019 | 34,527,731 | 2018 | 34,820,247 | 2017 | 34,954,158 | 2016 | 34,946,581 | 2015 | 34,871,711 | 2014 | 34,818,011 | 2013 | 34,820,178 | 2012 | 34,904,520 | 2011 | 35,062,594 | 2010 | 35,294,426 | 2009 | 35,450,101 | 2008 | 35,502,909 | 2007 | 35,406,315 | 2006 | 35,241,093 | 2005 | 35,070,869 | 2004 | 35,045,745 | 2003 | 35,212,613 | 2002 | 35,557,599 | 2001 | 36,114,162 | 2000 | 36,745,694 | 1999 | 37,216,943 | 1998 | 37,536,907 | 1997 | 37,740,956 | 1996 | 37,699,443 | 1995 | 37,629,067 | 1994 | 37,827,958 | 1993 | 38,134,307 | 1992 | 38,363,649 | 1991 | 38,581,323 | 1990 | 38,681,869 | 1989 | 38,545,524 | 1988 | 38,290,308 | 1987 | 37,991,193 | 1986 | 37,635,068 | 1985 | 37,229,798 | 1984 | 36,831,045 | 1983 | 36,401,126 | 1982 | 35,957,643 | 1981 | 35,723,263 | 1980 | 35,422,589 | 1979 | 35,026,812 | 1978 | 34,930,797 | 1977 | 35,071,765 | 1976 | 34,771,816 | 1975 | 33,781,192 | 1974 | 32,661,885 | 1973 | 31,541,098 | 1972 | 30,254,160 | 1971 | 29,219,258 | 1970 | 28,954,392 | 1969 | 29,043,026 | 1968 | 28,885,448 | 1967 | 28,729,160 | 1966 | 28,600,689 | 1965 | 28,323,369 | 1964 | 27,931,015 | 1963 | 27,503,313 | 1962 | 27,118,030 | 1961 | 26,844,525 | 1960 | 26,781,108 |
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