| Year | Value | | 2022 | 15,955,181 | | 2021 | 15,376,997 | | 2020 | 14,833,897 | | 2019 | 14,319,374 | | 2018 | 13,833,269 | | 2017 | 13,363,939 | | 2016 | 12,909,498 | | 2015 | 12,485,268 | | 2014 | 12,089,430 | | 2013 | 11,718,446 | | 2012 | 11,379,202 | | 2011 | 11,059,683 | | 2010 | 10,758,266 | | 2009 | 10,466,163 | | 2008 | 10,170,478 | | 2007 | 9,880,467 | | 2006 | 9,593,760 | | 2005 | 9,304,039 | | 2004 | 9,022,406 | | 2003 | 8,749,129 | | 2002 | 8,476,951 | | 2001 | 8,215,091 | | 2000 | 7,970,939 | | 1999 | 7,715,396 | | 1998 | 7,450,156 | | 1997 | 7,215,429 | | 1996 | 7,004,641 | | 1995 | 6,795,814 | | 1994 | 6,605,574 | | 1993 | 6,425,506 | | 1992 | 6,227,454 | | 1991 | 6,043,851 | | 1990 | 5,893,948 | | 1989 | 5,752,210 | | 1988 | 5,628,777 | | 1987 | 5,525,318 | | 1986 | 5,423,683 | | 1985 | 5,323,078 | | 1984 | 5,221,093 | | 1983 | 5,115,696 | | 1982 | 5,013,726 | | 1981 | 4,933,101 | | 1980 | 4,874,502 | | 1979 | 4,809,628 | | 1978 | 4,722,868 | | 1977 | 4,635,935 | | 1976 | 4,551,585 | | 1975 | 4,458,856 | | 1974 | 4,363,408 | | 1973 | 4,265,989 | | 1972 | 4,169,421 | | 1971 | 4,073,658 | | 1970 | 3,977,270 | | 1969 | 3,884,262 | | 1968 | 3,791,308 | | 1967 | 3,697,508 | | 1966 | 3,607,766 | | 1965 | 3,522,272 | | 1964 | 3,440,412 | | 1963 | 3,366,321 | | 1962 | 3,298,883 | | 1961 | 3,232,753 | | 1960 | 3,166,383 |
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