Year | Value | 2023 | 174,770 | 2022 | 175,265 | 2021 | 175,998 | 2020 | 175,322 | 2019 | 173,546 | 2018 | 171,081 | 2017 | 169,032 | 2016 | 168,170 | 2015 | 167,670 | 2014 | 166,345 | 2013 | 162,859 | 2012 | 158,117 | 2011 | 154,346 | 2010 | 152,335 | 2009 | 152,108 | 2008 | 155,559 | 2007 | 161,984 | 2006 | 167,991 | 2005 | 173,144 | 2004 | 177,998 | 2003 | 181,875 | 2002 | 183,980 | 2001 | 185,203 | 2000 | 186,217 | 1999 | 186,858 | 1998 | 186,332 | 1997 | 186,081 | 1996 | 187,537 | 1995 | 189,494 | 1994 | 191,711 | 1993 | 194,419 | 1992 | 197,074 | 1991 | 198,251 | 1990 | 199,216 | 1989 | 201,687 | 1988 | 205,592 | 1987 | 209,839 | 1986 | 213,661 | 1985 | 214,532 | 1984 | 207,899 | 1983 | 195,569 | 1982 | 178,947 | 1981 | 165,475 | 1980 | 155,327 | 1979 | 148,503 | 1978 | 147,944 | 1977 | 149,730 | 1976 | 147,377 | 1975 | 143,817 | 1974 | 142,478 |
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