| Year | Value | | 2022 | 4,651,594 | | 2021 | 4,484,319 | | 2020 | 4,316,656 | | 2019 | 4,246,813 | | 2018 | 4,159,155 | | 2017 | 4,033,494 | | 2016 | 3,995,528 | | 2015 | 3,983,166 | | 2014 | 3,896,406 | | 2013 | 3,841,065 | | 2012 | 3,801,341 | | 2011 | 3,782,199 | | 2010 | 3,807,529 | | 2009 | 3,842,282 | | 2008 | 3,887,429 | | 2007 | 3,985,302 | | 2006 | 4,134,781 | | 2005 | 4,320,255 | | 2004 | 4,615,147 | | 2003 | 4,992,399 | | 2002 | 5,317,466 | | 2001 | 5,413,597 | | 2000 | 5,234,513 | | 1999 | 4,950,830 | | 1998 | 4,657,410 | | 1997 | 4,396,598 | | 1996 | 4,331,629 | | 1995 | 4,447,406 | | 1994 | 4,459,954 | | 1993 | 4,336,570 | | 1992 | 4,211,127 | | 1991 | 4,106,971 | | 1990 | 4,033,783 | | 1989 | 4,028,865 | | 1988 | 4,055,625 | | 1987 | 4,049,350 | | 1986 | 3,999,766 | | 1985 | 3,933,355 | | 1984 | 3,869,611 | | 1983 | 3,805,888 | | 1982 | 3,732,337 | | 1981 | 3,654,159 | | 1980 | 3,563,637 | | 1979 | 3,441,157 | | 1978 | 3,274,847 | | 1977 | 3,071,221 | | 1976 | 2,845,742 | | 1975 | 2,638,009 | | 1974 | 2,458,913 | | 1973 | 2,315,480 | | 1972 | 2,226,051 | | 1971 | 2,182,678 | | 1970 | 2,136,365 | | 1969 | 2,133,272 | | 1968 | 2,155,613 | | 1967 | 2,174,413 | | 1966 | 2,175,674 | | 1965 | 2,167,447 | | 1964 | 2,154,282 | | 1963 | 2,135,877 | | 1962 | 2,115,226 | | 1961 | 2,079,834 | | 1960 | 2,031,683 |
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