Year | Value | 2022 | 36,730,596 | 2021 | 37,001,918 | 2020 | 37,192,207 | 2019 | 37,217,864 | 2018 | 37,191,137 | 2017 | 37,065,513 | 2016 | 36,922,371 | 2015 | 36,776,389 | 2014 | 36,782,726 | 2013 | 36,982,811 | 2012 | 37,312,448 | 2011 | 37,793,695 | 2010 | 38,388,763 | 2009 | 38,827,860 | 2008 | 39,119,400 | 2007 | 39,248,628 | 2006 | 39,141,293 | 2005 | 39,024,109 | 2004 | 39,162,027 | 2003 | 39,410,946 | 2002 | 39,616,122 | 2001 | 39,841,535 | 2000 | 40,009,786 | 1999 | 39,891,117 | 1998 | 39,611,592 | 1997 | 39,258,816 | 1996 | 38,831,825 | 1995 | 38,326,346 | 1994 | 37,806,548 | 1993 | 37,240,410 | 1992 | 36,654,440 | 1991 | 36,292,036 | 1990 | 35,870,423 | 1989 | 35,421,273 | 1988 | 35,307,927 | 1987 | 35,353,304 | 1986 | 34,950,309 | 1985 | 33,911,027 | 1984 | 32,715,850 | 1983 | 31,550,468 | 1982 | 30,311,150 | 1981 | 29,287,505 | 1980 | 29,066,887 | 1979 | 29,163,905 | 1978 | 28,975,298 | 1977 | 28,783,679 | 1976 | 28,709,546 | 1975 | 28,490,667 | 1974 | 28,079,227 | 1973 | 27,712,024 | 1972 | 27,388,102 | 1971 | 27,115,633 | 1970 | 27,051,418 | 1969 | 27,349,872 | 1968 | 27,605,186 | 1967 | 27,701,043 | 1966 | 27,635,042 | 1965 | 27,240,114 | 1964 | 26,550,481 | 1963 | 25,988,162 | 1962 | 25,506,571 | 1961 | 24,905,000 | 1960 | 24,495,429 |
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