| Year | Value | | 2022 | 15,556,585 | | 2021 | 15,047,857 | | 2020 | 14,582,830 | | 2019 | 14,170,040 | | 2018 | 13,766,615 | | 2017 | 13,346,640 | | 2016 | 12,889,868 | | 2015 | 12,360,466 | | 2014 | 11,826,564 | | 2013 | 11,330,839 | | 2012 | 10,853,391 | | 2011 | 10,400,200 | | 2010 | 9,962,008 | | 2009 | 9,572,156 | | 2008 | 9,228,976 | | 2007 | 8,890,690 | | 2006 | 8,563,784 | | 2005 | 8,254,737 | | 2004 | 7,946,525 | | 2003 | 7,652,579 | | 2002 | 7,390,553 | | 2001 | 7,126,593 | | 2000 | 6,847,231 | | 1999 | 6,573,645 | | 1998 | 6,297,799 | | 1997 | 6,021,762 | | 1996 | 5,757,997 | | 1995 | 5,497,224 | | 1994 | 5,229,189 | | 1993 | 4,976,504 | | 1992 | 4,721,775 | | 1991 | 4,453,497 | | 1990 | 4,234,068 | | 1989 | 4,050,390 | | 1988 | 3,934,160 | | 1987 | 3,857,307 | | 1986 | 3,801,248 | | 1985 | 3,754,149 | | 1984 | 3,710,372 | | 1983 | 3,664,725 | | 1982 | 3,614,695 | | 1981 | 3,543,975 | | 1980 | 3,465,850 | | 1979 | 3,394,902 | | 1978 | 3,322,714 | | 1977 | 3,245,834 | | 1976 | 3,156,052 | | 1975 | 3,069,567 | | 1974 | 2,992,964 | | 1973 | 2,920,768 | | 1972 | 2,850,445 | | 1971 | 2,778,732 | | 1970 | 2,700,682 | | 1969 | 2,616,551 | | 1968 | 2,526,699 | | 1967 | 2,434,827 | | 1966 | 2,349,139 | | 1965 | 2,277,693 | | 1964 | 2,217,323 | | 1963 | 2,167,823 | | 1962 | 2,128,064 | | 1961 | 2,091,828 | | 1960 | 2,060,433 |
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