| Year | Value | | 2022 | 4,695,135 | | 2021 | 4,789,841 | | 2020 | 4,818,401 | | 2019 | 4,772,006 | | 2018 | 4,670,902 | | 2017 | 4,584,189 | | 2016 | 4,421,639 | | 2015 | 4,254,623 | | 2014 | 4,192,427 | | 2013 | 4,118,803 | | 2012 | 4,004,320 | | 2011 | 3,977,365 | | 2010 | 3,978,250 | | 2009 | 3,896,056 | | 2008 | 3,847,714 | | 2007 | 3,811,037 | | 2006 | 3,790,874 | | 2005 | 3,814,228 | | 2004 | 3,854,868 | | 2003 | 3,904,647 | | 2002 | 4,005,875 | | 2001 | 4,165,477 | | 2000 | 4,358,073 | | 1999 | 4,656,062 | | 1998 | 5,032,998 | | 1997 | 5,354,662 | | 1996 | 5,440,639 | | 1995 | 5,259,428 | | 1994 | 4,986,988 | | 1993 | 4,709,913 | | 1992 | 4,471,901 | | 1991 | 4,429,452 | | 1990 | 4,553,998 | | 1989 | 4,562,947 | | 1988 | 4,434,542 | | 1987 | 4,309,182 | | 1986 | 4,201,583 | | 1985 | 4,130,095 | | 1984 | 4,128,654 | | 1983 | 4,158,492 | | 1982 | 4,153,977 | | 1981 | 4,110,977 | | 1980 | 4,046,464 | | 1979 | 3,981,979 | | 1978 | 3,916,215 | | 1977 | 3,840,884 | | 1976 | 3,768,290 | | 1975 | 3,700,680 | | 1974 | 3,621,105 | | 1973 | 3,532,354 | | 1972 | 3,436,532 | | 1971 | 3,324,295 | | 1970 | 3,188,288 | | 1969 | 3,078,183 | | 1968 | 2,946,588 | | 1967 | 2,831,661 | | 1966 | 2,742,756 | | 1965 | 2,663,898 | | 1964 | 2,616,292 | | 1963 | 2,609,967 | | 1962 | 2,601,088 | | 1961 | 2,579,548 | | 1960 | 2,545,263 |
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