Year | Value | 2022 | 18,605,603 | 2021 | 18,410,922 | 2020 | 18,213,816 | 2019 | 18,022,621 | 2018 | 17,840,191 | 2017 | 17,646,668 | 2016 | 17,442,227 | 2015 | 17,235,856 | 2014 | 17,027,786 | 2013 | 16,812,735 | 2012 | 16,594,445 | 2011 | 16,378,020 | 2010 | 16,167,193 | 2009 | 15,965,384 | 2008 | 15,770,522 | 2007 | 15,577,682 | 2006 | 15,385,576 | 2005 | 15,191,659 | 2004 | 14,994,480 | 2003 | 14,810,456 | 2002 | 14,636,269 | 2001 | 14,456,567 | 2000 | 14,275,254 | 1999 | 14,092,998 | 1998 | 13,906,379 | 1997 | 13,714,278 | 1996 | 13,519,731 | 1995 | 13,323,326 | 1994 | 13,124,740 | 1993 | 12,924,447 | 1992 | 12,718,823 | 1991 | 12,510,233 | 1990 | 12,299,808 | 1989 | 12,087,228 | 1988 | 11,872,303 | 1987 | 11,650,961 | 1986 | 11,422,605 | 1985 | 11,178,638 | 1984 | 10,921,726 | 1983 | 10,659,487 | 1982 | 10,389,668 | 1981 | 10,118,930 | 1980 | 9,854,260 | 1979 | 9,599,344 | 1978 | 9,354,790 | 1977 | 9,117,082 | 1976 | 8,888,284 | 1975 | 8,666,727 | 1974 | 8,449,697 | 1973 | 8,237,565 | 1972 | 8,028,282 | 1971 | 7,824,917 | 1970 | 7,626,034 | 1969 | 7,430,072 | 1968 | 7,239,222 | 1967 | 7,051,624 | 1966 | 6,868,445 | 1965 | 6,692,302 | 1964 | 6,525,230 | 1963 | 6,367,675 | 1962 | 6,208,208 | 1961 | 6,048,401 | 1960 | 5,894,745 |
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