| Year | Value | | 2023 | 3,401,446 | | 2022 | 3,486,940 | | 2021 | 3,503,126 | | 2020 | 3,486,170 | | 2019 | 3,474,951 | | 2018 | 3,452,003 | | 2017 | 3,415,189 | | 2016 | 3,376,248 | | 2015 | 3,328,433 | | 2014 | 3,265,696 | | 2013 | 3,218,951 | | 2012 | 3,195,032 | | 2011 | 3,181,075 | | 2010 | 3,163,003 | | 2009 | 3,146,761 | | 2008 | 3,150,621 | | 2007 | 3,183,056 | | 2006 | 3,263,605 | | 2005 | 3,307,219 | | 2004 | 3,333,534 | | 2003 | 3,336,226 | | 2002 | 3,310,490 | | 2001 | 3,260,503 | | 2000 | 3,198,101 | | 1999 | 3,133,885 | | 1998 | 3,078,316 | | 1997 | 3,039,744 | | 1996 | 3,014,658 | | 1995 | 2,995,720 | | 1994 | 2,966,161 | | 1993 | 2,920,370 | | 1992 | 2,870,267 | | 1991 | 2,820,213 | | 1990 | 2,770,777 | | 1989 | 2,721,273 | | 1988 | 2,669,890 | | 1987 | 2,614,756 | | 1986 | 2,554,043 | | 1985 | 2,482,547 | | 1984 | 2,400,989 | | 1983 | 2,315,043 | | 1982 | 2,229,182 | | 1981 | 2,157,609 | | 1980 | 2,098,384 | | 1979 | 2,041,920 | | 1978 | 1,990,947 | | 1977 | 1,943,852 | | 1976 | 1,898,225 | | 1975 | 1,844,789 | | 1974 | 1,781,750 |
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