| Year | Value | | 2022 | 2,961,483 | | 2021 | 2,975,442 | | 2020 | 2,975,536 | | 2019 | 2,980,120 | | 2018 | 2,986,773 | | 2017 | 2,981,359 | | 2016 | 2,977,848 | | 2015 | 2,976,323 | | 2014 | 2,978,025 | | 2013 | 3,004,978 | | 2012 | 3,061,043 | | 2011 | 3,120,089 | | 2010 | 3,196,506 | | 2009 | 3,285,469 | | 2008 | 3,366,016 | | 2007 | 3,430,600 | | 2006 | 3,493,121 | | 2005 | 3,564,326 | | 2004 | 3,646,829 | | 2003 | 3,748,249 | | 2002 | 3,868,534 | | 2001 | 4,014,643 | | 2000 | 4,179,546 | | 1999 | 4,365,347 | | 1998 | 4,563,410 | | 1997 | 4,729,860 | | 1996 | 4,837,608 | | 1995 | 4,875,847 | | 1994 | 4,838,992 | | 1993 | 4,744,346 | | 1992 | 4,659,049 | | 1991 | 4,494,429 | | 1990 | 4,326,407 | | 1989 | 4,265,749 | | 1988 | 4,190,752 | | 1987 | 4,078,230 | | 1986 | 4,053,416 | | 1985 | 4,048,241 | | 1984 | 3,962,809 | | 1983 | 3,913,689 | | 1982 | 3,875,434 | | 1981 | 3,856,263 | | 1980 | 3,878,547 | | 1979 | 3,918,117 | | 1978 | 3,974,048 | | 1977 | 4,090,743 | | 1976 | 4,259,563 | | 1975 | 4,453,078 | | 1974 | 4,740,589 | | 1973 | 5,102,801 | | 1972 | 5,412,674 | | 1971 | 5,498,970 | | 1970 | 5,294,191 | | 1969 | 5,058,937 | | 1968 | 4,802,789 | | 1967 | 4,576,752 | | 1966 | 4,530,984 | | 1965 | 4,644,846 | | 1964 | 4,640,525 | | 1963 | 4,514,465 | | 1962 | 4,397,757 | | 1961 | 4,304,075 | | 1960 | 4,245,694 |
|