| Year | Value | | 2022 | 35,190,893 | | 2021 | 34,633,981 | | 2020 | 33,739,320 | | 2019 | 32,698,943 | | 2018 | 31,593,960 | | 2017 | 30,423,362 | | 2016 | 29,255,245 | | 2015 | 28,130,583 | | 2014 | 27,073,492 | | 2013 | 26,061,301 | | 2012 | 25,042,424 | | 2011 | 24,065,975 | | 2010 | 23,075,631 | | 2009 | 22,047,637 | | 2008 | 20,993,327 | | 2007 | 19,948,593 | | 2006 | 18,989,170 | | 2005 | 18,035,060 | | 2004 | 17,063,501 | | 2003 | 16,173,989 | | 2002 | 15,436,567 | | 2001 | 14,815,462 | | 2000 | 14,296,603 | | 1999 | 13,894,079 | | 1998 | 13,548,324 | | 1997 | 13,280,818 | | 1996 | 13,064,780 | | 1995 | 12,792,631 | | 1994 | 12,399,778 | | 1993 | 11,935,315 | | 1992 | 11,478,597 | | 1991 | 11,082,106 | | 1990 | 10,709,959 | | 1989 | 10,283,148 | | 1988 | 9,845,180 | | 1987 | 9,434,029 | | 1986 | 9,025,340 | | 1985 | 8,613,402 | | 1984 | 8,202,042 | | 1983 | 7,766,884 | | 1982 | 7,327,008 | | 1981 | 6,912,711 | | 1980 | 6,521,413 | | 1979 | 6,181,167 | | 1978 | 5,897,271 | | 1977 | 5,632,905 | | 1976 | 5,388,006 | | 1975 | 5,153,308 | | 1974 | 4,927,060 | | 1973 | 4,721,358 | | 1972 | 4,544,732 | | 1971 | 4,399,909 | | 1970 | 4,275,500 | | 1969 | 4,148,708 | | 1968 | 4,000,194 | | 1967 | 3,843,541 | | 1966 | 3,703,542 | | 1965 | 3,584,949 | | 1964 | 3,483,549 | | 1963 | 3,392,776 | | 1962 | 3,304,196 | | 1961 | 3,243,033 | | 1960 | 3,225,921 |
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