| Year | Value | | 2022 | 5,323,037 | | 2021 | 5,276,578 | | 2020 | 5,204,858 | | 2019 | 5,119,620 | | 2018 | 5,049,750 | | 2017 | 4,987,005 | | 2016 | 4,919,908 | | 2015 | 4,840,045 | | 2014 | 4,755,612 | | 2013 | 4,671,683 | | 2012 | 4,564,895 | | 2011 | 4,437,333 | | 2010 | 4,316,038 | | 2009 | 4,211,159 | | 2008 | 4,112,748 | | 2007 | 4,030,010 | | 2006 | 3,970,912 | | 2005 | 3,932,667 | | 2004 | 3,902,300 | | 2003 | 3,858,522 | | 2002 | 3,794,351 | | 2001 | 3,713,014 | | 2000 | 3,617,807 | | 1999 | 3,518,905 | | 1998 | 3,425,347 | | 1997 | 3,338,183 | | 1996 | 3,258,027 | | 1995 | 3,193,180 | | 1994 | 3,144,610 | | 1993 | 3,095,596 | | 1992 | 3,036,106 | | 1991 | 2,960,359 | | 1990 | 2,873,308 | | 1989 | 2,790,354 | | 1988 | 2,717,613 | | 1987 | 2,651,057 | | 1986 | 2,586,965 | | 1985 | 2,521,899 | | 1984 | 2,454,906 | | 1983 | 2,386,165 | | 1982 | 2,319,837 | | 1981 | 2,259,800 | | 1980 | 2,209,444 | | 1979 | 2,170,431 | | 1978 | 2,129,460 | | 1977 | 2,073,815 | | 1976 | 2,003,023 | | 1975 | 1,921,324 | | 1974 | 1,840,175 | | 1973 | 1,763,322 | | 1972 | 1,686,289 | | 1971 | 1,610,439 | | 1970 | 1,540,691 | | 1969 | 1,483,589 | | 1968 | 1,435,275 | | 1967 | 1,389,516 | | 1966 | 1,348,460 | | 1965 | 1,311,936 | | 1964 | 1,280,357 | | 1963 | 1,255,455 | | 1962 | 1,234,382 | | 1961 | 1,212,860 | | 1960 | 1,186,853 |
|