Year | Value | 2022 | 14,665,155 | 2021 | 14,855,223 | 2020 | 14,727,414 | 2019 | 14,583,482 | 2018 | 14,412,814 | 2017 | 14,172,352 | 2016 | 13,906,196 | 2015 | 13,647,415 | 2014 | 13,393,757 | 2013 | 13,055,806 | 2012 | 12,616,817 | 2011 | 12,111,331 | 2010 | 11,271,592 | 2009 | 10,105,966 | 2008 | 9,002,614 | 2007 | 8,232,441 | 2006 | 7,981,962 | 2005 | 8,389,499 | 2004 | 9,314,190 | 2003 | 10,465,262 | 2002 | 11,543,176 | 2001 | 12,122,118 | 2000 | 12,174,901 | 1999 | 11,827,985 | 1998 | 11,180,334 | 1997 | 10,593,314 | 1996 | 10,265,673 | 1995 | 10,291,309 | 1994 | 10,670,942 | 1993 | 11,238,616 | 1992 | 11,676,596 | 1991 | 11,927,018 | 1990 | 12,011,740 | 1989 | 11,906,659 | 1988 | 11,621,835 | 1987 | 11,164,638 | 1986 | 10,563,600 | 1985 | 9,850,221 | 1984 | 9,149,116 | 1983 | 8,504,092 | 1982 | 7,846,504 | 1981 | 7,310,317 | 1980 | 7,118,544 | 1979 | 7,310,178 | 1978 | 7,662,050 | 1977 | 8,227,330 | 1976 | 8,915,715 | 1975 | 9,341,436 | 1974 | 9,419,857 | 1973 | 9,283,664 | 1972 | 9,071,645 | 1971 | 8,804,196 | 1970 | 8,578,868 | 1969 | 8,370,841 | 1968 | 8,181,562 | 1967 | 8,011,738 | 1966 | 7,801,876 | 1965 | 7,657,509 | 1964 | 7,460,616 | 1963 | 7,132,488 | 1962 | 6,773,678 | 1961 | 6,484,783 | 1960 | 6,152,904 |
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