| Year | Value | | 2024 | 34,145,777 | | 2023 | 33,078,918 | | 2022 | 32,063,777 | | 2021 | 31,424,728 | | 2020 | 31,164,845 | | 2019 | 30,747,991 | | 2018 | 30,232,734 | | 2017 | 29,748,383 | | 2016 | 29,358,914 | | 2015 | 29,008,679 | | 2014 | 28,776,424 | | 2013 | 28,479,956 | | 2012 | 28,170,388 | | 2011 | 27,850,187 | | 2010 | 27,548,892 | | 2009 | 27,192,999 | | 2008 | 26,818,233 | | 2007 | 26,456,662 | | 2006 | 26,128,307 | | 2005 | 25,786,467 | | 2004 | 25,452,772 | | 2003 | 25,121,387 | | 2002 | 24,804,820 | | 2001 | 24,457,300 | | 2000 | 24,127,975 | | 1999 | 23,847,964 | | 1998 | 23,602,268 | | 1997 | 23,353,656 | | 1996 | 23,064,128 | | 1995 | 22,749,039 | | 1994 | 22,422,480 | | 1993 | 22,086,284 | | 1992 | 21,770,770 | | 1991 | 21,475,370 | | 1990 | 21,199,350 | | 1989 | 20,876,032 | | 1988 | 20,500,429 | | 1987 | 20,231,106 | | 1986 | 19,957,782 | | 1985 | 19,737,813 | | 1984 | 19,517,196 | | 1983 | 19,285,680 | | 1982 | 19,052,106 | | 1981 | 18,798,471 | | 1980 | 18,552,651 | | 1979 | 18,301,539 | | 1978 | 18,110,478 | | 1977 | 17,923,769 | | 1976 | 17,712,333 |
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