Year | Value | 2022 | 31,449,891 | 2021 | 31,496,350 | 2020 | 31,634,815 | 2019 | 31,747,106 | 2018 | 31,872,363 | 2017 | 31,998,562 | 2016 | 32,131,924 | 2015 | 32,207,277 | 2014 | 32,333,116 | 2013 | 32,586,786 | 2012 | 32,946,358 | 2011 | 33,383,473 | 2010 | 33,872,221 | 2009 | 34,232,535 | 2008 | 34,474,133 | 2007 | 34,548,688 | 2006 | 34,501,794 | 2005 | 34,421,955 | 2004 | 34,356,411 | 2003 | 34,321,302 | 2002 | 34,342,517 | 2001 | 34,414,809 | 2000 | 34,562,790 | 1999 | 34,722,318 | 1998 | 34,800,108 | 1997 | 34,768,042 | 1996 | 34,676,823 | 1995 | 34,626,632 | 1994 | 34,750,078 | 1993 | 35,058,600 | 1992 | 35,527,086 | 1991 | 36,166,601 | 1990 | 36,826,711 | 1989 | 37,347,176 | 1988 | 37,699,861 | 1987 | 37,949,513 | 1986 | 37,962,589 | 1985 | 37,966,231 | 1984 | 38,255,163 | 1983 | 38,675,136 | 1982 | 39,043,042 | 1981 | 39,381,018 | 1980 | 39,565,083 | 1979 | 39,476,528 | 1978 | 39,217,918 | 1977 | 38,883,147 | 1976 | 38,475,693 | 1975 | 38,003,852 | 1974 | 37,503,760 | 1973 | 36,994,221 | 1972 | 36,518,600 | 1971 | 36,280,253 | 1970 | 35,886,202 | 1969 | 35,467,232 | 1968 | 35,372,761 | 1967 | 35,446,502 | 1966 | 35,110,828 | 1965 | 34,195,008 | 1964 | 33,099,998 | 1963 | 31,942,186 | 1962 | 30,697,463 | 1961 | 29,634,376 | 1960 | 29,391,724 |
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