| Year | Value | | 2023 | 296,071 | | 2022 | 295,993 | | 2021 | 294,881 | | 2020 | 292,759 | | 2019 | 290,173 | | 2018 | 287,276 | | 2017 | 283,815 | | 2016 | 279,618 | | 2015 | 274,821 | | 2014 | 269,479 | | 2013 | 263,415 | | 2012 | 256,688 | | 2011 | 249,638 | | 2010 | 242,128 | | 2009 | 234,400 | | 2008 | 226,851 | | 2007 | 219,625 | | 2006 | 212,823 | | 2005 | 206,722 | | 2004 | 201,730 | | 2003 | 197,714 | | 2002 | 194,995 | | 2001 | 193,114 | | 2000 | 191,074 | | 1999 | 188,968 | | 1998 | 187,160 | | 1997 | 185,712 | | 1996 | 184,455 | | 1995 | 183,062 | | 1994 | 181,264 | | 1993 | 178,886 | | 1992 | 175,692 | | 1991 | 171,488 | | 1990 | 166,320 | | 1989 | 160,471 | | 1988 | 154,226 | | 1987 | 147,906 | | 1986 | 141,800 | | 1985 | 136,000 | | 1984 | 130,516 | | 1983 | 125,279 | | 1982 | 120,249 | | 1981 | 115,740 | | 1980 | 111,789 | | 1979 | 108,268 | | 1978 | 105,039 | | 1977 | 101,644 | | 1976 | 98,111 | | 1975 | 94,702 | | 1974 | 91,372 |
|