| Year | Value | | 2022 | 16,156,117 | | 2021 | 15,862,892 | | 2020 | 15,579,207 | | 2019 | 15,184,756 | | 2018 | 14,767,658 | | 2017 | 14,387,563 | | 2016 | 14,027,792 | | 2015 | 13,662,259 | | 2014 | 13,287,968 | | 2013 | 12,911,200 | | 2012 | 12,534,906 | | 2011 | 12,175,359 | | 2010 | 11,845,842 | | 2009 | 11,544,386 | | 2008 | 11,254,943 | | 2007 | 10,971,776 | | 2006 | 10,682,247 | | 2005 | 10,378,349 | | 2004 | 10,058,439 | | 2003 | 9,721,201 | | 2002 | 9,373,811 | | 2001 | 9,024,788 | | 2000 | 8,680,858 | | 1999 | 8,347,586 | | 1998 | 8,033,558 | | 1997 | 7,736,570 | | 1996 | 7,456,012 | | 1995 | 7,208,014 | | 1994 | 6,995,986 | | 1993 | 6,808,509 | | 1992 | 6,638,996 | | 1991 | 6,480,987 | | 1990 | 6,332,706 | | 1989 | 6,195,210 | | 1988 | 6,068,655 | | 1987 | 5,943,757 | | 1986 | 5,814,681 | | 1985 | 5,678,567 | | 1984 | 5,537,982 | | 1983 | 5,391,017 | | 1982 | 5,235,947 | | 1981 | 5,081,862 | | 1980 | 4,935,881 | | 1979 | 4,788,186 | | 1978 | 4,639,980 | | 1977 | 4,497,917 | | 1976 | 4,348,380 | | 1975 | 4,185,535 | | 1974 | 4,011,878 | | 1973 | 3,823,996 | | 1972 | 3,630,076 | | 1971 | 3,464,443 | | 1970 | 3,335,182 | | 1969 | 3,232,764 | | 1968 | 3,166,924 | | 1967 | 3,130,251 | | 1966 | 3,092,351 | | 1965 | 3,027,676 | | 1964 | 2,927,501 | | 1963 | 2,789,567 | | 1962 | 2,627,731 | | 1961 | 2,476,232 | | 1960 | 2,363,588 |
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