| Year | Value | | 2022 | 6,974,900 | | 2021 | 6,773,400 | | 2020 | 6,579,900 | | 2019 | 6,456,200 | | 2018 | 6,322,800 | | 2017 | 6,198,200 | | 2016 | 6,079,500 | | 2015 | 5,956,900 | | 2014 | 5,835,500 | | 2013 | 5,719,600 | | 2012 | 5,607,200 | | 2011 | 5,514,600 | | 2010 | 5,447,900 | | 2009 | 5,383,300 | | 2008 | 5,318,700 | | 2007 | 5,268,400 | | 2006 | 5,218,400 | | 2005 | 5,162,600 | | 2004 | 5,104,700 | | 2003 | 5,043,300 | | 2002 | 4,990,700 | | 2001 | 4,945,100 | | 2000 | 4,898,400 | | 1999 | 4,840,400 | | 1998 | 4,769,000 | | 1997 | 4,696,400 | | 1996 | 4,628,400 | | 1995 | 4,560,400 | | 1994 | 4,515,100 | | 1993 | 4,516,700 | | 1992 | 4,515,400 | | 1991 | 4,463,600 | | 1990 | 4,391,200 | | 1989 | 4,307,500 | | 1988 | 4,218,400 | | 1987 | 4,144,600 | | 1986 | 4,066,500 | | 1985 | 3,990,300 | | 1984 | 3,916,400 | | 1983 | 3,838,300 | | 1982 | 3,759,300 | | 1981 | 3,685,800 | | 1980 | 3,617,400 | | 1979 | 3,552,000 | | 1978 | 3,487,100 | | 1977 | 3,423,900 | | 1976 | 3,358,700 | | 1975 | 3,292,400 | | 1974 | 3,223,900 | | 1973 | 3,153,800 | | 1972 | 3,088,200 | | 1971 | 3,022,300 | | 1970 | 2,959,900 | | 1969 | 2,894,800 | | 1968 | 2,818,300 | | 1967 | 2,736,500 | | 1966 | 2,655,300 | | 1965 | 2,573,300 | | 1964 | 2,495,300 | | 1963 | 2,413,700 | | 1962 | 2,333,400 | | 1961 | 2,255,900 | | 1960 | 2,172,300 |
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