Year Measure 1990 2383.22769 1991 2324.98091 1992 2128.35097 1993 2018.22988 1994 1924.47602 1995 1844.19574 1996 1827.7718 1997 1815.8195 1998 1779.88441 1999 1745.95307 2000 1780.45792 2001 1769.39608 2002 1775.80984 2003 1764.45626 2004 1765.48028 2005 1717.20105 2006 1755.75963 2007 1664.06134 2008 1652.65101 2009 1643.14988 2010 1653.4675 2011 1631.52621 2012 1610.80791 2013 1637.19448 2014 1645.44163