| Year | Value | | 2023 | 3,767,234 | | 2022 | 3,649,587 | | 2021 | 3,581,717 | | 2020 | 3,564,391 | | 2019 | 3,548,335 | | 2018 | 3,540,449 | | 2017 | 3,544,290 | | 2016 | 3,512,722 | | 2015 | 3,441,623 | | 2014 | 3,368,983 | | 2013 | 3,287,616 | | 2012 | 3,197,529 | | 2011 | 3,100,453 | | 2010 | 3,000,487 | | 2009 | 2,899,543 | | 2008 | 2,795,813 | | 2007 | 2,688,181 | | 2006 | 2,578,105 | | 2005 | 2,466,841 | | 2004 | 2,347,763 | | 2003 | 2,230,439 | | 2002 | 2,138,270 | | 2001 | 2,069,696 | | 2000 | 2,020,528 | | 1999 | 1,993,573 | | 1998 | 1,974,467 | | 1997 | 1,941,542 | | 1996 | 1,894,910 | | 1995 | 1,845,166 | | 1994 | 1,794,959 | | 1993 | 1,747,659 | | 1992 | 1,703,744 | | 1991 | 1,660,169 | | 1990 | 1,616,442 | | 1989 | 1,574,121 | | 1988 | 1,533,563 | | 1987 | 1,494,767 | | 1986 | 1,458,651 | | 1985 | 1,425,578 | | 1984 | 1,394,256 | | 1983 | 1,363,372 | | 1982 | 1,332,846 | | 1981 | 1,303,837 | | 1980 | 1,279,712 | | 1979 | 1,258,929 | | 1978 | 1,237,702 | | 1977 | 1,215,728 | | 1976 | 1,192,569 | | 1975 | 1,168,142 |
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