Year | Value | 2023 | 17,980,083 | 2022 | 17,823,897 | 2021 | 17,682,454 | 2020 | 17,546,065 | 2019 | 17,340,021 | 2018 | 17,049,547 | 2017 | 16,759,519 | 2016 | 16,505,139 | 2015 | 16,266,225 | 2014 | 16,035,124 | 2013 | 15,807,128 | 2012 | 15,572,194 | 2011 | 15,326,227 | 2010 | 15,076,695 | 2009 | 14,825,954 | 2008 | 14,575,202 | 2007 | 14,328,773 | 2006 | 14,086,131 | 2005 | 13,846,163 | 2004 | 13,608,701 | 2003 | 13,372,306 | 2002 | 13,138,472 | 2001 | 12,910,740 | 2000 | 12,689,206 | 1999 | 12,470,795 | 1998 | 12,251,184 | 1997 | 12,031,127 | 1996 | 11,810,950 | 1995 | 11,590,514 | 1994 | 11,372,197 | 1993 | 11,154,274 | 1992 | 10,930,128 | 1991 | 10,702,380 | 1990 | 10,473,673 | 1989 | 10,241,852 | 1988 | 10,010,808 | 1987 | 9,779,290 | 1986 | 9,545,998 | 1985 | 9,311,154 | 1984 | 9,074,782 | 1983 | 8,840,417 | 1982 | 8,611,298 | 1981 | 8,386,910 | 1980 | 8,165,877 | 1979 | 7,948,869 | 1978 | 7,736,167 | 1977 | 7,526,819 | 1976 | 7,320,912 | 1975 | 7,118,251 |
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