Year | Value | 2022 | 36,698,317 | 2021 | 36,876,912 | 2020 | 36,840,578 | 2019 | 36,653,281 | 2018 | 36,554,652 | 2017 | 36,527,294 | 2016 | 36,572,725 | 2015 | 36,641,592 | 2014 | 36,713,875 | 2013 | 36,693,715 | 2012 | 36,598,944 | 2011 | 36,524,573 | 2010 | 36,546,610 | 2009 | 36,616,323 | 2008 | 36,803,556 | 2007 | 37,076,741 | 2006 | 37,535,777 | 2005 | 38,082,184 | 2004 | 38,515,753 | 2003 | 38,796,581 | 2002 | 38,971,881 | 2001 | 38,924,769 | 2000 | 38,880,401 | 1999 | 39,069,788 | 1998 | 39,380,033 | 1997 | 39,645,359 | 1996 | 39,911,261 | 1995 | 40,067,251 | 1994 | 39,930,505 | 1993 | 39,598,775 | 1992 | 39,167,456 | 1991 | 38,644,266 | 1990 | 38,063,200 | 1989 | 37,559,207 | 1988 | 37,053,178 | 1987 | 36,563,754 | 1986 | 36,320,424 | 1985 | 36,027,645 | 1984 | 35,664,276 | 1983 | 35,627,132 | 1982 | 35,739,951 | 1981 | 35,369,387 | 1980 | 34,332,728 | 1979 | 33,143,304 | 1978 | 31,966,570 | 1977 | 30,704,343 | 1976 | 29,637,228 | 1975 | 29,408,937 | 1974 | 29,475,440 | 1973 | 29,233,034 | 1972 | 28,988,494 | 1971 | 28,860,174 | 1970 | 28,553,426 | 1969 | 28,134,516 | 1968 | 27,757,128 | 1967 | 27,449,457 | 1966 | 27,213,054 | 1965 | 27,220,081 | 1964 | 27,493,981 | 1963 | 27,710,867 | 1962 | 27,759,523 | 1961 | 27,666,304 | 1960 | 27,288,847 |
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