Year | Value | 2023 | 157,592 | 2022 | 159,520 | 2021 | 172,095 | 2020 | 173,247 | 2019 | 169,251 | 2018 | 162,810 | 2017 | 156,216 | 2016 | 149,705 | 2015 | 144,103 | 2014 | 140,626 | 2013 | 138,845 | 2012 | 138,569 | 2011 | 139,893 | 2010 | 143,106 | 2009 | 148,033 | 2008 | 153,449 | 2007 | 158,201 | 2006 | 161,232 | 2005 | 162,116 | 2004 | 161,282 | 2003 | 159,550 | 2002 | 157,826 | 2001 | 159,067 | 2000 | 161,430 | 1999 | 162,110 | 1998 | 162,584 | 1997 | 162,719 | 1996 | 162,507 | 1995 | 160,761 | 1994 | 156,023 | 1993 | 148,852 | 1992 | 141,044 | 1991 | 133,067 | 1990 | 126,389 | 1989 | 125,974 | 1988 | 131,076 | 1987 | 137,103 | 1986 | 143,406 | 1985 | 150,049 | 1984 | 154,002 | 1983 | 154,095 | 1982 | 153,570 | 1981 | 152,033 | 1980 | 148,335 | 1979 | 143,701 | 1978 | 139,560 | 1977 | 135,688 | 1976 | 131,224 | 1975 | 126,652 | 1974 | 122,177 |
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