Year | Value | 2022 | 17,465,347 | 2021 | 17,370,767 | 2020 | 16,850,320 | 2019 | 15,984,207 | 2018 | 15,101,565 | 2017 | 14,263,117 | 2016 | 13,658,430 | 2015 | 13,628,654 | 2014 | 13,974,253 | 2013 | 14,341,745 | 2012 | 14,737,205 | 2011 | 14,958,753 | 2010 | 14,906,212 | 2009 | 14,597,680 | 2008 | 14,150,133 | 2007 | 13,696,326 | 2006 | 13,375,517 | 2005 | 13,251,671 | 2004 | 13,289,181 | 2003 | 13,455,583 | 2002 | 13,588,463 | 2001 | 13,547,746 | 2000 | 13,319,184 | 1999 | 12,939,974 | 1998 | 12,477,422 | 1997 | 11,967,640 | 1996 | 11,514,215 | 1995 | 11,137,676 | 1994 | 10,697,081 | 1993 | 10,067,639 | 1992 | 9,333,867 | 1991 | 8,622,397 | 1990 | 8,073,402 | 1989 | 7,970,289 | 1988 | 8,348,194 | 1987 | 8,991,251 | 1986 | 9,659,407 | 1985 | 10,158,033 | 1984 | 10,368,845 | 1983 | 10,361,783 | 1982 | 10,276,114 | 1981 | 10,160,801 | 1980 | 10,033,411 | 1979 | 9,873,179 | 1978 | 9,700,298 | 1977 | 9,513,676 | 1976 | 9,317,048 | 1975 | 9,121,965 | 1974 | 8,889,445 | 1973 | 8,599,183 | 1972 | 8,285,765 | 1971 | 7,975,833 | 1970 | 7,684,691 | 1969 | 7,424,591 | 1968 | 7,214,372 | 1967 | 7,026,992 | 1966 | 6,839,980 | 1965 | 6,673,254 | 1964 | 6,532,688 | 1963 | 6,438,088 | 1962 | 6,379,106 | 1961 | 6,314,423 | 1960 | 6,251,357 |
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