| Year | Value | | 2022 | 396,894 | | 2021 | 397,319 | | 2020 | 398,578 | | 2019 | 400,950 | | 2018 | 402,401 | | 2017 | 400,911 | | 2016 | 395,235 | | 2015 | 384,895 | | 2014 | 370,912 | | 2013 | 354,126 | | 2012 | 335,243 | | 2011 | 316,615 | | 2010 | 299,633 | | 2009 | 284,146 | | 2008 | 269,871 | | 2007 | 257,227 | | 2006 | 245,944 | | 2005 | 235,199 | | 2004 | 224,680 | | 2003 | 214,756 | | 2002 | 206,707 | | 2001 | 199,554 | | 2000 | 192,153 | | 1999 | 184,820 | | 1998 | 177,432 | | 1997 | 169,697 | | 1996 | 161,540 | | 1995 | 152,755 | | 1994 | 142,421 | | 1993 | 130,926 | | 1992 | 120,438 | | 1991 | 111,915 | | 1990 | 105,599 | | 1989 | 101,266 | | 1988 | 98,175 | | 1987 | 95,823 | | 1986 | 93,647 | | 1985 | 91,413 | | 1984 | 89,096 | | 1983 | 86,691 | | 1982 | 84,173 | | 1981 | 81,648 | | 1980 | 79,202 | | 1979 | 76,779 | | 1978 | 74,254 | | 1977 | 71,714 | | 1976 | 69,374 | | 1975 | 67,343 | | 1974 | 65,638 | | 1973 | 64,327 | | 1972 | 63,259 | | 1971 | 61,998 | | 1970 | 60,233 | | 1969 | 57,933 | | 1968 | 55,035 | | 1967 | 51,671 | | 1966 | 48,458 | | 1965 | 45,776 | | 1964 | 43,556 | | 1963 | 41,877 | | 1962 | 40,661 | | 1961 | 39,293 | | 1960 | 37,377 |
|