| Year | Value | | 2023 | 8,126,560 | | 2022 | 8,110,987 | | 2021 | 8,105,921 | | 2020 | 8,113,405 | | 2019 | 8,142,168 | | 2018 | 8,206,353 | | 2017 | 8,295,626 | | 2016 | 8,393,705 | | 2015 | 8,491,862 | | 2014 | 8,581,117 | | 2013 | 8,653,904 | | 2012 | 8,708,227 | | 2011 | 8,734,211 | | 2010 | 8,728,253 | | 2009 | 8,686,724 | | 2008 | 8,602,652 | | 2007 | 8,478,638 | | 2006 | 8,326,147 | | 2005 | 8,155,982 | | 2004 | 7,977,585 | | 2003 | 7,803,465 | | 2002 | 7,639,671 | | 2001 | 7,485,115 | | 2000 | 7,340,838 | | 1999 | 7,205,484 | | 1998 | 7,074,095 | | 1997 | 6,959,828 | | 1996 | 6,877,554 | | 1995 | 6,821,986 | | 1994 | 6,786,983 | | 1993 | 6,761,388 | | 1992 | 6,721,836 | | 1991 | 6,656,537 | | 1990 | 6,565,302 | | 1989 | 6,448,824 | | 1988 | 6,313,136 | | 1987 | 6,163,898 | | 1986 | 6,007,814 | | 1985 | 5,845,270 | | 1984 | 5,677,253 | | 1983 | 5,508,247 | | 1982 | 5,341,398 | | 1981 | 5,176,053 | | 1980 | 5,009,752 | | 1979 | 4,845,835 | | 1978 | 4,672,568 | | 1977 | 4,481,437 | | 1976 | 4,281,002 | | 1975 | 4,074,151 |
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