Year | Value | 2022 | 15,973,936 | 2021 | 16,641,731 | 2020 | 16,822,523 | 2019 | 16,868,562 | 2018 | 16,815,544 | 2017 | 16,617,828 | 2016 | 16,252,146 | 2015 | 15,900,222 | 2014 | 15,582,849 | 2013 | 15,212,994 | 2012 | 14,862,089 | 2011 | 14,619,425 | 2010 | 14,384,812 | 2009 | 14,147,241 | 2008 | 13,951,188 | 2007 | 13,794,339 | 2006 | 13,669,752 | 2005 | 13,526,541 | 2004 | 13,371,963 | 2003 | 13,257,433 | 2002 | 13,122,071 | 2001 | 12,961,405 | 2000 | 12,900,112 | 1999 | 12,963,734 | 1998 | 13,167,435 | 1997 | 13,490,981 | 1996 | 13,914,954 | 1995 | 14,352,434 | 1994 | 14,718,362 | 1993 | 14,899,790 | 1992 | 14,939,022 | 1991 | 14,825,136 | 1990 | 14,567,646 | 1989 | 14,331,253 | 1988 | 14,093,148 | 1987 | 13,773,419 | 1986 | 13,442,860 | 1985 | 13,152,514 | 1984 | 12,877,452 | 1983 | 12,524,389 | 1982 | 12,120,175 | 1981 | 11,681,883 | 1980 | 10,915,829 | 1979 | 9,826,250 | 1978 | 8,761,619 | 1977 | 7,951,822 | 1976 | 7,667,206 | 1975 | 8,074,324 | 1974 | 8,995,226 | 1973 | 10,172,016 | 1972 | 11,313,158 | 1971 | 11,928,934 | 1970 | 11,993,491 | 1969 | 11,660,470 | 1968 | 11,007,453 | 1967 | 10,370,671 | 1966 | 9,972,891 | 1965 | 9,955,909 | 1964 | 10,230,694 | 1963 | 10,710,196 | 1962 | 11,092,712 | 1961 | 11,198,460 | 1960 | 10,930,417 |
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