| Year | Value | | 2024 | 5,331,638 | | 2023 | 5,342,131 | | 2022 | 5,355,417 | | 2021 | 5,370,195 | | 2020 | 5,374,390 | | 2019 | 5,356,671 | | 2018 | 5,316,442 | | 2017 | 5,264,077 | | 2016 | 5,208,154 | | 2015 | 5,148,296 | | 2014 | 5,089,539 | | 2013 | 5,036,737 | | 2012 | 4,989,117 | | 2011 | 4,936,775 | | 2010 | 4,873,936 | | 2009 | 4,811,181 | | 2008 | 4,755,116 | | 2007 | 4,700,461 | | 2006 | 4,650,650 | | 2005 | 4,613,401 | | 2004 | 4,583,076 | | 2003 | 4,553,526 | | 2002 | 4,520,203 | | 2001 | 4,480,340 | | 2000 | 4,427,357 | | 1999 | 4,362,909 | | 1998 | 4,291,590 | | 1997 | 4,209,253 | | 1996 | 4,116,911 | | 1995 | 4,019,763 | | 1994 | 3,919,180 | | 1993 | 3,812,742 | | 1992 | 3,701,959 | | 1991 | 3,589,443 | | 1990 | 3,476,346 | | 1989 | 3,371,170 | | 1988 | 3,272,185 | | 1987 | 3,171,019 | | 1986 | 3,069,874 | | 1985 | 2,969,791 | | 1984 | 2,869,537 | | 1983 | 2,766,918 | | 1982 | 2,661,992 | | 1981 | 2,556,463 | | 1980 | 2,460,761 | | 1979 | 2,377,426 | | 1978 | 2,300,312 | | 1977 | 2,224,183 | | 1976 | 2,145,366 | | 1975 | 2,069,199 |
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