Year | Value | 2022 | 46,227,621 | 2021 | 45,987,418 | 2020 | 45,839,722 | 2019 | 45,565,822 | 2018 | 45,373,893 | 2017 | 45,285,150 | 2016 | 45,310,696 | 2015 | 45,385,962 | 2014 | 45,460,095 | 2013 | 45,426,155 | 2012 | 45,282,109 | 2011 | 45,100,241 | 2010 | 44,942,238 | 2009 | 44,789,924 | 2008 | 44,757,822 | 2007 | 44,834,861 | 2006 | 45,103,302 | 2005 | 45,444,412 | 2004 | 45,673,799 | 2003 | 45,783,841 | 2002 | 45,775,778 | 2001 | 45,514,612 | 2000 | 45,285,330 | 1999 | 45,338,544 | 1998 | 45,428,434 | 1997 | 45,414,569 | 1996 | 45,415,251 | 1995 | 45,311,577 | 1994 | 44,911,262 | 1993 | 44,359,469 | 1992 | 43,776,788 | 1991 | 43,156,974 | 1990 | 42,518,138 | 1989 | 41,953,544 | 1988 | 41,400,716 | 1987 | 40,831,171 | 1986 | 40,406,139 | 1985 | 39,934,834 | 1984 | 39,335,987 | 1983 | 39,010,822 | 1982 | 38,971,380 | 1981 | 38,530,594 | 1980 | 37,410,220 | 1979 | 36,212,896 | 1978 | 34,992,089 | 1977 | 33,552,081 | 1976 | 32,297,678 | 1975 | 31,806,305 | 1974 | 31,521,985 | 1973 | 30,938,785 | 1972 | 30,356,951 | 1971 | 29,950,575 | 1970 | 29,542,855 | 1969 | 29,195,487 | 1968 | 28,907,594 | 1967 | 28,692,963 | 1966 | 28,514,090 | 1965 | 28,401,535 | 1964 | 28,424,517 | 1963 | 28,469,834 | 1962 | 28,480,131 | 1961 | 28,528,190 | 1960 | 28,551,821 |
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