| Year | Value | | 2022 | 3,868,739 | | 2021 | 4,008,616 | | 2020 | 4,168,331 | | 2019 | 4,341,833 | | 2018 | 4,523,228 | | 2017 | 4,677,406 | | 2016 | 4,772,360 | | 2015 | 4,800,274 | | 2014 | 4,759,321 | | 2013 | 4,667,574 | | 2012 | 4,590,383 | | 2011 | 4,437,991 | | 2010 | 4,282,008 | | 2009 | 4,220,587 | | 2008 | 4,147,711 | | 2007 | 4,030,773 | | 2006 | 3,998,012 | | 2005 | 3,992,307 | | 2004 | 3,912,860 | | 2003 | 3,866,576 | | 2002 | 3,828,469 | | 2001 | 3,809,061 | | 2000 | 3,832,098 | | 1999 | 3,872,403 | | 1998 | 3,921,352 | | 1997 | 4,026,350 | | 1996 | 4,191,757 | | 1995 | 4,389,868 | | 1994 | 4,690,686 | | 1993 | 5,068,362 | | 1992 | 5,389,557 | | 1991 | 5,470,349 | | 1990 | 5,285,188 | | 1989 | 5,016,877 | | 1988 | 4,745,222 | | 1987 | 4,514,925 | | 1986 | 4,475,724 | | 1985 | 4,596,486 | | 1984 | 4,592,185 | | 1983 | 4,456,291 | | 1982 | 4,326,178 | | 1981 | 4,218,832 | | 1980 | 4,149,064 | | 1979 | 4,149,518 | | 1978 | 4,180,027 | | 1977 | 4,177,785 | | 1976 | 4,138,873 | | 1975 | 4,079,123 | | 1974 | 4,013,388 | | 1973 | 3,944,780 | | 1972 | 3,863,645 | | 1971 | 3,784,101 | | 1970 | 3,682,023 | | 1969 | 3,612,309 | | 1968 | 3,530,222 | | 1967 | 3,445,152 | | 1966 | 3,338,973 | | 1965 | 3,236,003 | | 1964 | 3,125,438 | | 1963 | 2,993,889 | | 1962 | 2,875,464 | | 1961 | 2,789,699 | | 1960 | 2,713,168 |
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