Year | Value | 2022 | 31,794,206 | 2021 | 32,288,324 | 2020 | 32,957,042 | 2019 | 33,443,320 | 2018 | 33,811,022 | 2017 | 34,067,058 | 2016 | 34,241,349 | 2015 | 34,359,253 | 2014 | 34,485,838 | 2013 | 34,627,110 | 2012 | 34,712,575 | 2011 | 34,672,492 | 2010 | 34,572,072 | 2009 | 34,381,444 | 2008 | 34,138,489 | 2007 | 33,867,976 | 2006 | 33,714,929 | 2005 | 33,757,141 | 2004 | 33,881,223 | 2003 | 33,977,978 | 2002 | 34,098,182 | 2001 | 34,250,569 | 2000 | 34,383,881 | 1999 | 34,526,262 | 1998 | 34,748,032 | 1997 | 35,041,264 | 1996 | 35,391,131 | 1995 | 35,759,351 | 1994 | 36,063,958 | 1993 | 36,224,328 | 1992 | 36,235,587 | 1991 | 36,186,139 | 1990 | 36,146,163 | 1989 | 36,112,671 | 1988 | 36,094,101 | 1987 | 36,175,198 | 1986 | 36,350,121 | 1985 | 36,594,551 | 1984 | 36,837,023 | 1983 | 36,990,230 | 1982 | 37,027,359 | 1981 | 37,007,149 | 1980 | 37,008,726 | 1979 | 37,120,565 | 1978 | 37,349,447 | 1977 | 37,700,207 | 1976 | 38,199,507 | 1975 | 38,728,912 | 1974 | 39,103,170 | 1973 | 39,365,196 | 1972 | 39,573,847 | 1971 | 39,574,413 | 1970 | 39,567,057 | 1969 | 39,897,559 | 1968 | 40,296,238 | 1967 | 40,660,182 | 1966 | 41,038,691 | 1965 | 41,276,124 | 1964 | 41,217,468 | 1963 | 41,030,417 | 1962 | 40,796,621 | 1961 | 40,507,760 | 1960 | 40,208,479 |
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