Year | Value | 2022 | 23,843,271 | 2021 | 24,053,703 | 2020 | 24,278,613 | 2019 | 24,461,683 | 2018 | 24,609,311 | 2017 | 24,731,228 | 2016 | 24,817,871 | 2015 | 24,889,051 | 2014 | 24,947,049 | 2013 | 24,984,089 | 2012 | 24,997,489 | 2011 | 24,986,399 | 2010 | 24,965,313 | 2009 | 24,963,911 | 2008 | 24,983,933 | 2007 | 24,996,326 | 2006 | 24,994,407 | 2005 | 24,981,414 | 2004 | 24,950,113 | 2003 | 24,908,767 | 2002 | 24,860,923 | 2001 | 24,803,845 | 2000 | 24,740,449 | 1999 | 24,622,214 | 1998 | 24,463,227 | 1997 | 24,293,764 | 1996 | 24,114,740 | 1995 | 23,960,696 | 1994 | 23,858,142 | 1993 | 23,743,407 | 1992 | 23,620,450 | 1991 | 23,491,814 | 1990 | 23,356,516 | 1989 | 23,303,090 | 1988 | 23,303,123 | 1987 | 23,294,746 | 1986 | 23,279,683 | 1985 | 23,247,758 | 1984 | 23,195,539 | 1983 | 23,124,084 | 1982 | 23,036,938 | 1981 | 22,937,148 | 1980 | 22,790,243 | 1979 | 22,664,334 | 1978 | 22,485,721 | 1977 | 22,280,637 | 1976 | 22,070,619 | 1975 | 21,857,444 | 1974 | 21,626,906 | 1973 | 21,384,912 | 1972 | 21,132,523 | 1971 | 20,873,764 | 1970 | 20,608,055 | 1969 | 20,348,490 | 1968 | 20,089,375 | 1967 | 19,821,057 | 1966 | 19,544,984 | 1965 | 19,261,585 | 1964 | 18,972,250 | 1963 | 18,685,643 | 1962 | 18,402,411 | 1961 | 18,124,373 | 1960 | 17,860,929 |
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