Year | Value | 2022 | 26,775,643 | 2021 | 26,566,988 | 2020 | 26,414,088 | 2019 | 26,365,724 | 2018 | 26,383,491 | 2017 | 26,491,299 | 2016 | 26,669,284 | 2015 | 26,875,089 | 2014 | 27,153,961 | 2013 | 27,528,774 | 2012 | 28,024,323 | 2011 | 28,689,531 | 2010 | 29,463,878 | 2009 | 30,255,865 | 2008 | 31,069,261 | 2007 | 31,796,775 | 2006 | 32,383,985 | 2005 | 32,739,669 | 2004 | 32,945,906 | 2003 | 33,080,866 | 2002 | 33,062,808 | 2001 | 32,888,169 | 2000 | 32,735,036 | 1999 | 32,608,360 | 1998 | 32,402,502 | 1997 | 32,198,674 | 1996 | 32,085,744 | 1995 | 32,022,253 | 1994 | 32,005,175 | 1993 | 32,035,390 | 1992 | 32,148,881 | 1991 | 32,326,169 | 1990 | 32,458,386 | 1989 | 32,588,546 | 1988 | 32,721,843 | 1987 | 32,786,804 | 1986 | 32,783,365 | 1985 | 32,857,338 | 1984 | 33,074,998 | 1983 | 33,359,646 | 1982 | 33,659,599 | 1981 | 33,991,039 | 1980 | 34,277,500 | 1979 | 34,420,722 | 1978 | 34,356,250 | 1977 | 34,124,450 | 1976 | 33,799,586 | 1975 | 33,395,678 | 1974 | 32,977,402 | 1973 | 32,579,315 | 1972 | 32,160,013 | 1971 | 31,754,381 | 1970 | 31,485,529 | 1969 | 31,279,655 | 1968 | 30,959,859 | 1967 | 30,538,153 | 1966 | 29,976,940 | 1965 | 28,776,018 | 1964 | 27,032,559 | 1963 | 25,347,010 | 1962 | 23,921,017 | 1961 | 23,140,703 | 1960 | 23,484,727 |
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