Year Measure 1990 2178.54735 1991 2317.91875 1992 1199.77489 1993 651.93878 1994 419.82239 1995 511.1732 1996 562.16197 1997 594.25021 1998 609.99671 1999 593.54222 2000 656.30958 2001 657.48011 2002 618.47123 2003 656.50907 2004 698.10925 2005 842.70035 2006 864.82677 2007 972.6531 2008 1032.95796 2009 903.54651 2010 863.02836 2011 944.35455 2012 1030.76801 2013 1002.36806 2014 1018.07124