| Year | Value | | 2024 | 26,494,276 | | 2023 | 26,631,040 | | 2022 | 26,751,936 | | 2021 | 26,892,400 | | 2020 | 27,036,144 | | 2019 | 27,220,160 | | 2018 | 27,372,429 | | 2017 | 27,492,678 | | 2016 | 27,579,283 | | 2015 | 27,616,126 | | 2014 | 27,581,360 | | 2013 | 27,460,943 | | 2012 | 27,267,099 | | 2011 | 27,005,264 | | 2010 | 26,673,841 | | 2009 | 26,303,814 | | 2008 | 25,927,977 | | 2007 | 25,556,827 | | 2006 | 25,206,493 | | 2005 | 24,892,302 | | 2004 | 24,712,764 | | 2003 | 24,667,298 | | 2002 | 24,692,487 | | 2001 | 24,733,731 | | 2000 | 24,734,981 | | 1999 | 24,676,641 | | 1998 | 24,589,937 | | 1997 | 24,491,294 | | 1996 | 24,382,558 | | 1995 | 24,263,700 | | 1994 | 24,138,761 | | 1993 | 24,012,317 | | 1992 | 23,885,516 | | 1991 | 23,759,273 | | 1990 | 23,637,698 | | 1989 | 23,530,866 | | 1988 | 23,435,708 | | 1987 | 23,341,948 | | 1986 | 23,252,340 | | 1985 | 23,165,618 | | 1984 | 23,079,328 | | 1983 | 22,990,513 | | 1982 | 22,896,615 | | 1981 | 22,795,893 | | 1980 | 22,670,723 | | 1979 | 22,522,966 | | 1978 | 22,370,634 | | 1977 | 22,215,380 | | 1976 | 22,055,989 |
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