Year | Value | 2022 | 37,446,518 | 2021 | 37,071,840 | 2020 | 36,630,679 | 2019 | 36,060,400 | 2018 | 35,542,477 | 2017 | 35,028,472 | 2016 | 34,704,944 | 2015 | 34,322,011 | 2014 | 33,887,245 | 2013 | 33,749,828 | 2012 | 33,818,500 | 2011 | 33,485,696 | 2010 | 32,513,606 | 2009 | 31,298,873 | 2008 | 30,066,863 | 2007 | 28,713,821 | 2006 | 27,642,423 | 2005 | 27,389,338 | 2004 | 27,426,662 | 2003 | 27,224,037 | 2002 | 27,032,635 | 2001 | 26,857,625 | 2000 | 26,555,982 | 1999 | 26,147,722 | 1998 | 25,684,472 | 1997 | 25,241,978 | 1996 | 24,930,360 | 1995 | 24,786,866 | 1994 | 24,853,159 | 1993 | 25,033,100 | 1992 | 25,185,367 | 1991 | 25,295,789 | 1990 | 25,302,843 | 1989 | 25,190,923 | 1988 | 25,180,100 | 1987 | 25,187,774 | 1986 | 25,007,820 | 1985 | 24,835,733 | 1984 | 24,454,428 | 1983 | 23,399,753 | 1982 | 22,047,039 | 1981 | 20,874,306 | 1980 | 19,896,074 | 1979 | 19,564,498 | 1978 | 20,041,716 | 1977 | 20,919,583 | 1976 | 21,772,559 | 1975 | 22,326,377 | 1974 | 22,467,248 | 1973 | 22,319,226 | 1972 | 22,037,629 | 1971 | 21,629,122 | 1970 | 21,183,281 | 1969 | 20,742,159 | 1968 | 20,229,507 | 1967 | 19,797,710 | 1966 | 19,437,858 | 1965 | 19,100,699 | 1964 | 18,769,128 | 1963 | 18,458,198 | 1962 | 18,100,406 | 1961 | 17,723,363 | 1960 | 17,366,516 |
|