Year | Value | 2022 | 17,907,448 | 2021 | 17,138,137 | 2020 | 16,616,586 | 2019 | 16,175,742 | 2018 | 15,828,573 | 2017 | 15,603,967 | 2016 | 15,341,756 | 2015 | 15,043,009 | 2014 | 14,818,039 | 2013 | 14,605,900 | 2012 | 14,281,058 | 2011 | 13,850,752 | 2010 | 13,406,006 | 2009 | 12,952,000 | 2008 | 12,446,200 | 2007 | 11,965,907 | 2006 | 11,535,390 | 2005 | 11,102,675 | 2004 | 10,700,735 | 2003 | 10,287,873 | 2002 | 9,834,108 | 2001 | 9,434,230 | 2000 | 9,035,896 | 1999 | 8,568,955 | 1998 | 8,106,388 | 1997 | 7,710,907 | 1996 | 7,353,630 | 1995 | 7,014,358 | 1994 | 6,738,218 | 1993 | 6,534,345 | 1992 | 6,322,912 | 1991 | 6,080,515 | 1990 | 5,842,615 | 1989 | 5,592,377 | 1988 | 5,323,178 | 1987 | 5,081,715 | 1986 | 4,883,432 | 1985 | 4,698,551 | 1984 | 4,506,626 | 1983 | 4,330,333 | 1982 | 4,182,959 | 1981 | 4,038,003 | 1980 | 3,877,443 | 1979 | 3,691,044 | 1978 | 3,481,778 | 1977 | 3,278,247 | 1976 | 3,093,561 | 1975 | 2,933,468 | 1974 | 2,811,166 | 1973 | 2,703,590 | 1972 | 2,593,608 | 1971 | 2,486,476 | 1970 | 2,380,405 | 1969 | 2,289,792 | 1968 | 2,216,231 | 1967 | 2,150,919 | 1966 | 2,104,746 | 1965 | 2,078,246 | 1964 | 2,048,979 | 1963 | 2,011,514 | 1962 | 1,979,790 | 1961 | 1,987,458 | 1960 | 2,065,171 |
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