Year | Value | 2022 | 16,218,744 | 2021 | 16,069,789 | 2020 | 15,701,868 | 2019 | 15,388,404 | 2018 | 15,004,752 | 2017 | 14,649,486 | 2016 | 14,395,987 | 2015 | 14,158,166 | 2014 | 13,918,556 | 2013 | 13,714,719 | 2012 | 13,542,189 | 2011 | 13,378,512 | 2010 | 13,197,065 | 2009 | 13,005,505 | 2008 | 12,858,106 | 2007 | 12,710,900 | 2006 | 12,565,035 | 2005 | 12,496,273 | 2004 | 12,552,045 | 2003 | 12,724,929 | 2002 | 13,009,824 | 2001 | 13,397,859 | 2000 | 13,806,949 | 1999 | 14,134,055 | 1998 | 14,285,953 | 1997 | 14,302,581 | 1996 | 14,192,187 | 1995 | 13,961,072 | 1994 | 13,756,844 | 1993 | 13,598,067 | 1992 | 13,385,829 | 1991 | 13,135,332 | 1990 | 12,889,269 | 1989 | 12,662,049 | 1988 | 12,324,634 | 1987 | 11,885,089 | 1986 | 11,399,354 | 1985 | 10,614,665 | 1984 | 9,519,223 | 1983 | 8,462,941 | 1982 | 7,695,456 | 1981 | 7,439,459 | 1980 | 7,843,097 | 1979 | 8,746,484 | 1978 | 9,910,960 | 1977 | 11,048,415 | 1976 | 11,668,483 | 1975 | 11,727,947 | 1974 | 11,395,800 | 1973 | 10,739,768 | 1972 | 10,080,235 | 1971 | 9,652,878 | 1970 | 9,621,993 | 1969 | 9,945,958 | 1968 | 10,460,109 | 1967 | 10,868,630 | 1966 | 10,984,863 | 1965 | 10,716,966 | 1964 | 10,103,343 | 1963 | 9,287,765 | 1962 | 8,327,415 | 1961 | 7,396,613 | 1960 | 6,621,268 |
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