Year | Value | 2022 | 19,346,659 | 2021 | 18,995,529 | 2020 | 18,885,404 | 2019 | 18,680,213 | 2018 | 18,405,543 | 2017 | 18,138,320 | 2016 | 17,917,265 | 2015 | 17,714,395 | 2014 | 17,582,153 | 2013 | 17,402,916 | 2012 | 17,213,242 | 2011 | 17,020,916 | 2010 | 16,852,629 | 2009 | 16,666,218 | 2008 | 16,477,121 | 2007 | 16,300,676 | 2006 | 16,144,134 | 2005 | 15,980,635 | 2004 | 15,828,266 | 2003 | 15,680,044 | 2002 | 15,538,106 | 2001 | 15,366,067 | 2000 | 15,193,559 | 1999 | 15,047,875 | 1998 | 14,925,642 | 1997 | 14,802,324 | 1996 | 14,653,835 | 1995 | 14,502,515 | 1994 | 14,357,602 | 1993 | 14,205,971 | 1992 | 14,058,366 | 1991 | 13,898,978 | 1990 | 13,727,739 | 1989 | 13,525,249 | 1988 | 13,291,351 | 1987 | 13,124,619 | 1986 | 12,954,522 | 1985 | 12,829,620 | 1984 | 12,719,137 | 1983 | 12,607,190 | 1982 | 12,491,219 | 1981 | 12,351,269 | 1980 | 12,207,486 | 1979 | 12,059,357 | 1978 | 11,951,670 | 1977 | 11,846,663 | 1976 | 11,721,886 | 1975 | 11,580,385 | 1974 | 11,421,920 | 1973 | 11,271,483 | 1972 | 11,143,645 | 1971 | 11,017,954 | 1970 | 10,690,634 | 1969 | 10,541,470 | 1968 | 10,406,746 | 1967 | 10,245,973 | 1966 | 10,069,210 | 1965 | 9,891,746 | 1964 | 9,724,573 | 1963 | 9,554,327 | 1962 | 9,390,542 | 1961 | 9,230,191 | 1960 | 9,058,385 |
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