| Year | Value | | 2023 | 161,671.216 | | 2022 | 161,694.444 | | 2021 | 161,738.679 | | 2020 | 161,768.909 | | 2019 | 161,779.134 | | 2018 | 161,768.353 | | 2017 | 161,787.58 | | 2016 | 161,809.808 | | 2015 | 161,829.035 | | 2014 | 161,853.264 | | 2013 | 161,874.492 | | 2012 | 161,901.722 | | 2011 | 163,372.11 | | 2010 | 161,368.109 | | 2009 | 162,383.113 | | 2008 | 163,894.117 | | 2007 | 161,487.144 | | 2006 | 162,515.152 | | 2005 | 160,555.164 | | 2004 | 159,574.17 | | 2003 | 156,099.177 | | 2002 | 154,271.169 | | 2001 | 151,961.166 | | 2000 | 151,173.584 | | 1999 | 146,993.668 | | 1998 | 143,080.183 | | 1997 | 141,275.101 | | 1996 | 141,123.606 | | 1995 | 138,425.446 | | 1994 | 137,362.838 | | 1993 | 133,340.093 | | 1992 | 131,028.041 | | 1991 | 132,312.051 | | 1990 | 130,446.111 | | 1989 | 129,131.393 | | 1988 | 126,384.391 | | 1987 | 124,946.825 | | 1986 | 125,633.94 | | 1985 | 124,108.283 | | 1984 | 123,208.098 | | 1983 | 122,459.008 | | 1982 | 120,306.591 | | 1981 | 119,011.045 | | 1980 | 117,409.456 | | 1979 | 116,443.059 | | 1978 | 115,508.059 | | 1977 | 114,783.481 | | 1976 | 113,635.168 | | 1975 | 112,833.438 |
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