Year | Value | 2022 | 41,403,237 | 2021 | 41,718,986 | 2020 | 42,168,856 | 2019 | 42,389,852 | 2018 | 42,588,158 | 2017 | 42,712,755 | 2016 | 42,556,365 | 2015 | 42,277,400 | 2014 | 42,215,367 | 2013 | 42,223,980 | 2012 | 42,177,368 | 2011 | 42,231,689 | 2010 | 42,335,941 | 2009 | 42,094,632 | 2008 | 41,715,970 | 2007 | 41,312,865 | 2006 | 40,887,001 | 2005 | 40,407,696 | 2004 | 39,893,883 | 2003 | 39,313,176 | 2002 | 38,736,413 | 2001 | 38,355,166 | 2000 | 37,922,730 | 1999 | 37,367,959 | 1998 | 37,092,215 | 1997 | 37,043,451 | 1996 | 36,553,743 | 1995 | 35,366,264 | 1994 | 34,069,721 | 1993 | 32,786,618 | 1992 | 31,321,537 | 1991 | 30,056,863 | 1990 | 29,611,101 | 1989 | 29,499,403 | 1988 | 29,127,192 | 1987 | 28,767,975 | 1986 | 28,544,984 | 1985 | 28,304,037 | 1984 | 28,022,873 | 1983 | 27,763,351 | 1982 | 27,550,709 | 1981 | 27,402,612 | 1980 | 27,325,517 | 1979 | 27,380,223 | 1978 | 27,436,311 | 1977 | 27,433,587 | 1976 | 27,468,401 | 1975 | 27,474,586 | 1974 | 27,332,526 | 1973 | 27,352,907 | 1972 | 27,448,919 | 1971 | 27,330,798 | 1970 | 27,178,829 | 1969 | 26,823,346 | 1968 | 25,656,754 | 1967 | 24,154,280 | 1966 | 22,914,206 | 1965 | 21,903,364 | 1964 | 21,572,875 | 1963 | 22,152,136 | 1962 | 23,104,716 | 1961 | 23,957,384 | 1960 | 24,525,967 |
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