| Year | Value | | 2024 | 1,397,251 | | 2023 | 1,339,993 | | 2022 | 1,282,801 | | 2021 | 1,242,980 | | 2020 | 1,221,828 | | 2019 | 1,199,213 | | 2018 | 1,178,379 | | 2017 | 1,164,326 | | 2016 | 1,161,389 | | 2015 | 1,166,120 | | 2014 | 1,177,779 | | 2013 | 1,186,631 | | 2012 | 1,193,545 | | 2011 | 1,200,466 | | 2010 | 1,217,313 | | 2009 | 1,248,229 | | 2008 | 1,290,823 | | 2007 | 1,335,666 | | 2006 | 1,372,296 | | 2005 | 1,389,646 | | 2004 | 1,386,814 | | 2003 | 1,370,312 | | 2002 | 1,350,098 | | 2001 | 1,325,273 | | 2000 | 1,297,865 | | 1999 | 1,272,878 | | 1998 | 1,248,034 | | 1997 | 1,217,213 | | 1996 | 1,181,794 | | 1995 | 1,147,441 | | 1994 | 1,115,519 | | 1993 | 1,089,061 | | 1992 | 1,073,549 | | 1991 | 1,057,976 | | 1990 | 1,028,277 | | 1989 | 987,256 | | 1988 | 942,008 | | 1987 | 896,067 | | 1986 | 846,929 | | 1985 | 807,682 | | 1984 | 776,848 | | 1983 | 748,488 | | 1982 | 722,263 | | 1981 | 698,566 | | 1980 | 678,630 | | 1979 | 662,529 | | 1978 | 654,453 | | 1977 | 653,961 | | 1976 | 656,892 | | 1975 | 659,932 |
|