Year | Value | 2023 | 19,229,913 | 2022 | 19,526,684 | 2021 | 19,716,558 | 2020 | 19,924,769 | 2019 | 20,124,610 | 2018 | 20,235,389 | 2017 | 20,364,088 | 2016 | 20,506,038 | 2015 | 20,641,074 | 2014 | 20,779,679 | 2013 | 20,916,991 | 2012 | 21,068,777 | 2011 | 21,226,473 | 2010 | 21,339,222 | 2009 | 21,438,147 | 2008 | 21,563,474 | 2007 | 21,711,831 | 2006 | 22,099,308 | 2005 | 22,296,386 | 2004 | 22,481,230 | 2003 | 22,654,441 | 2002 | 22,814,023 | 2001 | 22,960,561 | 2000 | 23,068,540 | 1999 | 23,109,052 | 1998 | 23,133,669 | 1997 | 23,143,091 | 1996 | 23,136,890 | 1995 | 23,114,251 | 1994 | 23,058,996 | 1993 | 22,977,226 | 1992 | 22,895,658 | 1991 | 22,817,637 | 1990 | 22,852,696 | 1989 | 23,145,750 | 1988 | 23,403,786 | 1987 | 23,641,730 | 1986 | 23,854,020 | 1985 | 24,102,737 | 1984 | 24,472,735 | 1983 | 24,799,260 | 1982 | 25,082,131 | 1981 | 25,389,107 | 1980 | 25,528,836 | 1979 | 25,212,933 | 1978 | 24,907,940 | 1977 | 24,591,224 | 1976 | 24,265,538 | 1975 | 23,980,773 | 1974 | 23,756,206 |
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