Year | Value | 2022 | 37,749,261 | 2021 | 37,952,408 | 2020 | 38,455,278 | 2019 | 38,737,249 | 2018 | 38,927,214 | 2017 | 39,123,644 | 2016 | 39,395,840 | 2015 | 39,716,897 | 2014 | 40,050,024 | 2013 | 40,330,405 | 2012 | 40,495,628 | 2011 | 40,522,047 | 2010 | 40,579,153 | 2009 | 40,530,916 | 2008 | 40,312,510 | 2007 | 40,010,071 | 2006 | 39,796,997 | 2005 | 39,732,261 | 2004 | 39,867,442 | 2003 | 40,062,033 | 2002 | 40,158,479 | 2001 | 40,118,937 | 2000 | 39,941,964 | 1999 | 39,805,796 | 1998 | 39,838,511 | 1997 | 40,026,377 | 1996 | 40,399,286 | 1995 | 40,851,520 | 1994 | 41,217,126 | 1993 | 41,515,203 | 1992 | 41,772,724 | 1991 | 41,742,987 | 1990 | 41,585,857 | 1989 | 41,622,688 | 1988 | 41,710,051 | 1987 | 41,787,542 | 1986 | 41,960,928 | 1985 | 42,070,369 | 1984 | 41,879,126 | 1983 | 41,566,618 | 1982 | 41,236,727 | 1981 | 40,862,586 | 1980 | 40,406,317 | 1979 | 39,909,682 | 1978 | 39,365,971 | 1977 | 38,858,421 | 1976 | 38,577,808 | 1975 | 38,196,010 | 1974 | 37,662,307 | 1973 | 37,383,929 | 1972 | 37,210,729 | 1971 | 36,541,380 | 1970 | 35,204,836 | 1969 | 33,906,072 | 1968 | 32,696,746 | 1967 | 31,470,505 | 1966 | 30,451,491 | 1965 | 30,153,778 | 1964 | 30,101,636 | 1963 | 29,743,529 | 1962 | 29,359,317 | 1961 | 29,155,513 | 1960 | 28,878,569 |
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