Year | Value | 2022 | 20,491,585 | 2021 | 20,268,538 | 2020 | 20,045,810 | 2019 | 19,788,293 | 2018 | 19,508,253 | 2017 | 19,217,203 | 2016 | 18,912,762 | 2015 | 18,599,346 | 2014 | 18,271,388 | 2013 | 17,928,441 | 2012 | 17,580,686 | 2011 | 17,230,684 | 2010 | 16,881,310 | 2009 | 16,533,799 | 2008 | 16,185,896 | 2007 | 15,837,529 | 2006 | 15,488,437 | 2005 | 15,151,322 | 2004 | 14,847,192 | 2003 | 14,566,420 | 2002 | 14,290,346 | 2001 | 14,015,499 | 2000 | 13,735,499 | 1999 | 13,449,693 | 1998 | 13,163,136 | 1997 | 12,875,480 | 1996 | 12,585,518 | 1995 | 12,277,186 | 1994 | 11,940,947 | 1993 | 11,595,353 | 1992 | 11,249,970 | 1991 | 10,909,772 | 1990 | 10,575,574 | 1989 | 10,248,331 | 1988 | 9,928,495 | 1987 | 9,613,119 | 1986 | 9,309,023 | 1985 | 9,009,105 | 1984 | 8,713,807 | 1983 | 8,433,665 | 1982 | 8,169,223 | 1981 | 7,919,734 | 1980 | 7,682,994 | 1979 | 7,459,648 | 1978 | 7,250,637 | 1977 | 7,054,047 | 1976 | 6,866,895 | 1975 | 6,689,563 | 1974 | 6,521,981 | 1973 | 6,363,750 | 1972 | 6,212,762 | 1971 | 6,069,046 | 1970 | 5,933,407 | 1969 | 5,818,710 | 1968 | 5,711,385 | 1967 | 5,610,793 | 1966 | 5,515,212 | 1965 | 5,425,010 | 1964 | 5,339,744 | 1963 | 5,261,519 | 1962 | 5,187,771 | 1961 | 5,112,550 | 1960 | 5,038,095 |
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