Year | Value | 2022 | 41,235,428 | 2021 | 41,337,285 | 2020 | 41,472,023 | 2019 | 41,184,323 | 2018 | 40,842,198 | 2017 | 40,487,463 | 2016 | 40,094,912 | 2015 | 39,626,698 | 2014 | 39,122,922 | 2013 | 38,559,950 | 2012 | 37,977,562 | 2011 | 37,564,152 | 2010 | 37,171,596 | 2009 | 36,629,348 | 2008 | 36,361,956 | 2007 | 36,301,683 | 2006 | 35,815,815 | 2005 | 34,638,493 | 2004 | 33,329,118 | 2003 | 32,023,905 | 2002 | 30,574,352 | 2001 | 29,358,233 | 2000 | 28,939,099 | 1999 | 28,795,315 | 1998 | 28,392,049 | 1997 | 28,008,412 | 1996 | 27,750,337 | 1995 | 27,459,288 | 1994 | 27,135,944 | 1993 | 26,830,297 | 1992 | 26,559,561 | 1991 | 26,352,793 | 1990 | 26,215,820 | 1989 | 26,224,192 | 1988 | 26,288,132 | 1987 | 26,333,081 | 1986 | 26,382,513 | 1985 | 26,379,751 | 1984 | 26,262,276 | 1983 | 26,296,222 | 1982 | 26,375,721 | 1981 | 26,263,665 | 1980 | 26,176,289 | 1979 | 25,864,186 | 1978 | 24,740,535 | 1977 | 23,234,395 | 1976 | 21,957,449 | 1975 | 20,892,101 | 1974 | 20,469,438 | 1973 | 20,974,242 | 1972 | 21,889,282 | 1971 | 22,718,143 | 1970 | 23,246,301 | 1969 | 23,427,586 | 1968 | 23,315,779 | 1967 | 23,080,529 | 1966 | 22,716,440 | 1965 | 22,302,344 | 1964 | 21,852,325 | 1963 | 21,338,834 | 1962 | 20,897,261 | 1961 | 20,560,860 | 1960 | 20,242,711 |
|