Year | Value | 2022 | 20,504,851 | 2021 | 20,127,767 | 2020 | 19,770,292 | 2019 | 19,420,367 | 2018 | 19,073,750 | 2017 | 18,741,941 | 2016 | 18,434,974 | 2015 | 18,153,103 | 2014 | 17,894,883 | 2013 | 17,644,648 | 2012 | 17,378,399 | 2011 | 17,080,801 | 2010 | 16,746,097 | 2009 | 16,385,248 | 2008 | 15,986,795 | 2007 | 15,568,258 | 2006 | 15,135,423 | 2005 | 14,692,231 | 2004 | 14,242,230 | 2003 | 13,789,793 | 2002 | 13,340,700 | 2001 | 12,901,051 | 2000 | 12,475,018 | 1999 | 12,058,443 | 1998 | 11,633,039 | 1997 | 11,194,181 | 1996 | 10,751,613 | 1995 | 10,306,396 | 1994 | 9,873,773 | 1993 | 9,482,607 | 1992 | 9,140,087 | 1991 | 8,838,160 | 1990 | 8,574,557 | 1989 | 8,345,221 | 1988 | 8,139,596 | 1987 | 7,945,791 | 1986 | 7,760,635 | 1985 | 7,581,888 | 1984 | 7,409,719 | 1983 | 7,249,609 | 1982 | 7,105,006 | 1981 | 6,972,669 | 1980 | 6,846,549 | 1979 | 6,722,750 | 1978 | 6,598,828 | 1977 | 6,469,274 | 1976 | 6,330,280 | 1975 | 6,180,228 | 1974 | 6,018,590 | 1973 | 5,845,264 | 1972 | 5,662,866 | 1971 | 5,476,930 | 1970 | 5,290,102 | 1969 | 5,103,031 | 1968 | 4,918,957 | 1967 | 4,747,073 | 1966 | 4,597,167 | 1965 | 4,473,135 | 1964 | 4,372,356 | 1963 | 4,290,974 | 1962 | 4,220,651 | 1961 | 4,148,650 | 1960 | 4,067,475 |
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