| Year | Value | | 2023 | 2,867,602 | | 2022 | 2,980,007 | | 2021 | 3,104,228 | | 2020 | 3,251,590 | | 2019 | 3,382,706 | | 2018 | 3,423,967 | | 2017 | 3,398,104 | | 2016 | 3,350,386 | | 2015 | 3,297,965 | | 2014 | 3,256,686 | | 2013 | 3,221,268 | | 2012 | 3,194,017 | | 2011 | 3,171,620 | | 2010 | 3,160,852 | | 2009 | 3,169,076 | | 2008 | 3,195,486 | | 2007 | 3,220,062 | | 2006 | 3,275,202 | | 2005 | 3,307,636 | | 2004 | 3,339,135 | | 2003 | 3,368,093 | | 2002 | 3,395,307 | | 2001 | 3,421,381 | | 2000 | 3,447,207 | | 1999 | 3,466,900 | | 1998 | 3,478,006 | | 1997 | 3,480,358 | | 1996 | 3,473,786 | | 1995 | 3,462,488 | | 1994 | 3,454,973 | | 1993 | 3,459,397 | | 1992 | 3,476,307 | | 1991 | 3,501,571 | | 1990 | 3,526,429 | | 1989 | 3,536,132 | | 1988 | 3,531,041 | | 1987 | 3,524,384 | | 1986 | 3,518,327 | | 1985 | 3,510,003 | | 1984 | 3,499,543 | | 1983 | 3,482,761 | | 1982 | 3,451,387 | | 1981 | 3,409,790 | | 1980 | 3,363,815 | | 1979 | 3,332,309 | | 1978 | 3,310,609 | | 1977 | 3,275,516 | | 1976 | 3,223,501 | | 1975 | 3,189,387 | | 1974 | 3,177,012 |
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