Year | Value | 2022 | 176,479 | 2021 | 177,568 | 2020 | 179,902 | 2019 | 181,394 | 2018 | 181,793 | 2017 | 181,433 | 2016 | 179,448 | 2015 | 175,800 | 2014 | 170,926 | 2013 | 165,422 | 2012 | 160,181 | 2011 | 156,037 | 2010 | 152,805 | 2009 | 150,166 | 2008 | 147,711 | 2007 | 144,950 | 2006 | 143,238 | 2005 | 143,640 | 2004 | 145,784 | 2003 | 149,122 | 2002 | 153,355 | 2001 | 158,358 | 2000 | 162,623 | 1999 | 165,494 | 1998 | 167,584 | 1997 | 168,521 | 1996 | 168,381 | 1995 | 168,179 | 1994 | 167,208 | 1993 | 164,969 | 1992 | 162,191 | 1991 | 159,428 | 1990 | 157,101 | 1989 | 155,348 | 1988 | 153,980 | 1987 | 152,954 | 1986 | 152,732 | 1985 | 152,880 | 1984 | 152,668 | 1983 | 152,216 | 1982 | 151,518 | 1981 | 149,656 | 1980 | 147,719 | 1979 | 146,922 | 1978 | 146,573 | 1977 | 147,281 | 1976 | 150,075 | 1975 | 152,175 | 1974 | 151,608 | 1973 | 148,455 | 1972 | 142,006 | 1971 | 132,244 | 1970 | 122,648 | 1969 | 115,330 | 1968 | 109,430 | 1967 | 105,186 | 1966 | 102,683 | 1965 | 100,634 | 1964 | 98,124 | 1963 | 96,120 | 1962 | 95,483 | 1961 | 96,468 | 1960 | 98,663 |
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