| Year | Value | | 2022 | 17,831,229 | | 2021 | 17,570,777 | | 2020 | 17,340,526 | | 2019 | 17,104,106 | | 2018 | 16,857,577 | | 2017 | 16,591,880 | | 2016 | 16,285,853 | | 2015 | 15,937,618 | | 2014 | 15,549,998 | | 2013 | 15,131,354 | | 2012 | 14,697,264 | | 2011 | 14,262,268 | | 2010 | 13,834,320 | | 2009 | 13,422,609 | | 2008 | 13,010,538 | | 2007 | 12,606,983 | | 2006 | 12,211,822 | | 2005 | 11,827,793 | | 2004 | 11,450,454 | | 2003 | 11,061,552 | | 2002 | 10,659,985 | | 2001 | 10,255,150 | | 2000 | 9,855,480 | | 1999 | 9,476,240 | | 1998 | 9,136,672 | | 1997 | 8,840,651 | | 1996 | 8,580,055 | | 1995 | 8,344,387 | | 1994 | 8,121,274 | | 1993 | 7,909,000 | | 1992 | 7,703,623 | | 1991 | 7,501,394 | | 1990 | 7,298,675 | | 1989 | 7,101,298 | | 1988 | 6,919,769 | | 1987 | 6,754,989 | | 1986 | 6,605,275 | | 1985 | 6,471,525 | | 1984 | 6,350,783 | | 1983 | 6,235,993 | | 1982 | 6,122,038 | | 1981 | 6,004,851 | | 1980 | 5,880,329 | | 1979 | 5,747,333 | | 1978 | 5,605,856 | | 1977 | 5,455,861 | | 1976 | 5,300,712 | | 1975 | 5,143,330 | | 1974 | 4,983,875 | | 1973 | 4,824,203 | | 1972 | 4,672,927 | | 1971 | 4,538,880 | | 1970 | 4,429,466 | | 1969 | 4,342,352 | | 1968 | 4,270,396 | | 1967 | 4,208,556 | | 1966 | 4,147,058 | | 1965 | 4,077,946 | | 1964 | 3,999,662 | | 1963 | 3,912,622 | | 1962 | 3,818,264 | | 1961 | 3,721,666 | | 1960 | 3,626,674 |
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