| Year | Value | | 2024 | 5,804,487 | | 2023 | 5,433,696 | | 2022 | 5,100,301 | | 2021 | 4,937,079 | | 2020 | 4,948,399 | | 2019 | 5,009,833 | | 2018 | 5,084,278 | | 2017 | 5,150,766 | | 2016 | 5,107,717 | | 2015 | 4,952,880 | | 2014 | 4,784,353 | | 2013 | 4,613,473 | | 2012 | 4,442,624 | | 2011 | 4,287,895 | | 2010 | 4,160,846 | | 2009 | 4,050,806 | | 2008 | 3,953,162 | | 2007 | 3,865,490 | | 2006 | 3,788,410 | | 2005 | 3,719,232 | | 2004 | 3,648,024 | | 2003 | 3,567,315 | | 2002 | 3,477,111 | | 2001 | 3,378,930 | | 2000 | 3,281,127 | | 1999 | 3,181,125 | | 1998 | 3,073,603 | | 1997 | 2,962,677 | | 1996 | 2,849,700 | | 1995 | 2,735,931 | | 1994 | 2,613,957 | | 1993 | 2,495,894 | | 1992 | 2,406,784 | | 1991 | 2,338,108 | | 1990 | 2,277,381 | | 1989 | 2,236,263 | | 1988 | 2,207,411 | | 1987 | 2,164,027 | | 1986 | 2,106,791 | | 1985 | 2,047,693 | | 1984 | 1,989,570 | | 1983 | 1,934,325 | | 1982 | 1,882,491 | | 1981 | 1,835,737 | | 1980 | 1,797,170 | | 1979 | 1,763,701 | | 1978 | 1,730,706 | | 1977 | 1,698,075 | | 1976 | 1,666,810 | | 1975 | 1,637,263 |
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