| Year | Value | | 2024 | 5,942,272 | | 2023 | 6,050,520 | | 2022 | 6,109,671 | | 2021 | 6,035,453 | | 2020 | 5,835,444 | | 2019 | 5,600,201 | | 2018 | 5,369,942 | | 2017 | 5,160,970 | | 2016 | 5,015,152 | | 2015 | 4,926,589 | | 2014 | 4,851,074 | | 2013 | 4,788,486 | | 2012 | 4,735,827 | | 2011 | 4,668,864 | | 2010 | 4,586,921 | | 2009 | 4,510,778 | | 2008 | 4,442,725 | | 2007 | 4,379,704 | | 2006 | 4,334,616 | | 2005 | 4,309,206 | | 2004 | 4,282,220 | | 2003 | 4,248,612 | | 2002 | 4,208,255 | | 2001 | 4,165,136 | | 2000 | 4,101,620 | | 1999 | 4,016,205 | | 1998 | 3,926,952 | | 1997 | 3,834,160 | | 1996 | 3,738,306 | | 1995 | 3,640,901 | | 1994 | 3,541,995 | | 1993 | 3,439,198 | | 1992 | 3,330,214 | | 1991 | 3,211,683 | | 1990 | 3,080,697 | | 1989 | 2,935,253 | | 1988 | 2,792,012 | | 1987 | 2,680,127 | | 1986 | 2,599,098 | | 1985 | 2,536,446 | | 1984 | 2,495,980 | | 1983 | 2,465,747 | | 1982 | 2,417,969 | | 1981 | 2,358,797 | | 1980 | 2,307,146 | | 1979 | 2,262,841 | | 1978 | 2,223,821 | | 1977 | 2,188,806 | | 1976 | 2,154,415 | | 1975 | 2,118,390 |
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