Year | Value | 2022 | 32,877,843 | 2021 | 33,511,799 | 2020 | 33,729,310 | 2019 | 33,769,683 | 2018 | 33,709,261 | 2017 | 33,544,333 | 2016 | 33,294,118 | 2015 | 33,087,655 | 2014 | 32,930,286 | 2013 | 32,705,777 | 2012 | 32,459,849 | 2011 | 32,308,653 | 2010 | 32,182,092 | 2009 | 32,014,777 | 2008 | 31,887,193 | 2007 | 31,792,795 | 2006 | 31,793,152 | 2005 | 31,803,336 | 2004 | 31,788,244 | 2003 | 31,847,667 | 2002 | 31,909,516 | 2001 | 31,907,211 | 2000 | 31,982,786 | 1999 | 32,188,470 | 1998 | 32,467,693 | 1997 | 32,751,000 | 1996 | 33,083,235 | 1995 | 33,413,170 | 1994 | 33,599,457 | 1993 | 33,561,375 | 1992 | 33,420,709 | 1991 | 33,146,765 | 1990 | 32,708,816 | 1989 | 32,306,696 | 1988 | 31,904,936 | 1987 | 31,429,552 | 1986 | 30,948,160 | 1985 | 30,555,946 | 1984 | 30,256,975 | 1983 | 29,938,288 | 1982 | 29,580,920 | 1981 | 29,083,785 | 1980 | 27,914,374 | 1979 | 26,245,761 | 1978 | 24,658,397 | 1977 | 23,262,834 | 1976 | 22,485,333 | 1975 | 22,826,355 | 1974 | 23,889,859 | 1973 | 25,113,919 | 1972 | 26,334,689 | 1971 | 27,042,212 | 1970 | 27,099,771 | 1969 | 26,668,181 | 1968 | 25,863,273 | 1967 | 25,099,152 | 1966 | 24,639,224 | 1965 | 24,631,631 | 1964 | 24,940,828 | 1963 | 25,468,965 | 1962 | 25,874,523 | 1961 | 25,904,901 | 1960 | 25,489,180 |
|