| Year | Value | | 2022 | 4,214,102 | | 2021 | 4,127,384 | | 2020 | 4,071,934 | | 2019 | 4,090,595 | | 2018 | 4,203,011 | | 2017 | 4,385,216 | | 2016 | 4,610,404 | | 2015 | 4,870,990 | | 2014 | 5,092,407 | | 2013 | 5,218,577 | | 2012 | 5,284,024 | | 2011 | 5,280,693 | | 2010 | 5,196,598 | | 2009 | 5,126,573 | | 2008 | 5,064,449 | | 2007 | 4,980,472 | | 2006 | 4,918,259 | | 2005 | 4,863,522 | | 2004 | 4,806,342 | | 2003 | 4,727,025 | | 2002 | 4,595,876 | | 2001 | 4,419,852 | | 2000 | 4,091,291 | | 1999 | 3,553,635 | | 1998 | 3,000,057 | | 1997 | 2,589,420 | | 1996 | 2,449,738 | | 1995 | 2,680,563 | | 1994 | 3,215,890 | | 1993 | 3,899,201 | | 1992 | 4,535,239 | | 1991 | 4,842,903 | | 1990 | 4,825,484 | | 1989 | 4,606,308 | | 1988 | 4,229,759 | | 1987 | 3,911,988 | | 1986 | 3,750,663 | | 1985 | 3,776,654 | | 1984 | 3,991,902 | | 1983 | 4,319,953 | | 1982 | 4,574,936 | | 1981 | 4,677,179 | | 1980 | 4,590,755 | | 1979 | 4,307,944 | | 1978 | 3,897,849 | | 1977 | 3,408,648 | | 1976 | 2,926,742 | | 1975 | 2,533,311 | | 1974 | 2,248,690 | | 1973 | 2,093,200 | | 1972 | 2,001,510 | | 1971 | 1,921,549 | | 1970 | 1,928,684 | | 1969 | 2,035,988 | | 1968 | 2,138,353 | | 1967 | 2,273,791 | | 1966 | 2,456,419 | | 1965 | 2,572,864 | | 1964 | 2,571,660 | | 1963 | 2,502,776 | | 1962 | 2,425,952 | | 1961 | 2,359,939 | | 1960 | 2,276,544 |
|