| Year | Value | | 2023 | 3,137,151 | | 2022 | 3,158,532 | | 2021 | 3,179,105 | | 2020 | 3,212,793 | | 2019 | 3,255,125 | | 2018 | 3,297,739 | | 2017 | 3,345,729 | | 2016 | 3,376,291 | | 2015 | 3,378,757 | | 2014 | 3,353,380 | | 2013 | 3,312,583 | | 2012 | 3,270,432 | | 2011 | 3,232,678 | | 2010 | 3,200,879 | | 2009 | 3,174,477 | | 2008 | 3,149,282 | | 2007 | 3,138,162 | | 2006 | 3,180,812 | | 2005 | 3,208,520 | | 2004 | 3,242,276 | | 2003 | 3,277,956 | | 2002 | 3,314,710 | | 2001 | 3,348,303 | | 2000 | 3,371,953 | | 1999 | 3,382,497 | | 1998 | 3,375,550 | | 1997 | 3,346,221 | | 1996 | 3,299,401 | | 1995 | 3,246,268 | | 1994 | 3,191,766 | | 1993 | 3,141,825 | | 1992 | 3,104,227 | | 1991 | 3,073,720 | | 1990 | 3,042,140 | | 1989 | 3,004,095 | | 1988 | 2,957,680 | | 1987 | 2,906,518 | | 1986 | 2,853,966 | | 1985 | 2,801,721 | | 1984 | 2,749,307 | | 1983 | 2,693,642 | | 1982 | 2,633,313 | | 1981 | 2,574,778 | | 1980 | 2,514,193 | | 1979 | 2,466,384 | | 1978 | 2,426,084 | | 1977 | 2,363,998 | | 1976 | 2,286,944 | | 1975 | 2,212,558 | | 1974 | 2,152,034 |
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