Year Measure 1990 2722.59773 1991 2689.679 1992 1962.64098 1993 1195.02911 1994 1045.47974 1995 1050.24582 1996 1219.92983 1997 1509.05529 1998 1308.59232 1999 1307.5357 2000 1297.56827 2001 1269.23562 2002 1236.36366 2003 1320.49575 2004 1440.37283 2005 1521.50484 2006 1639.68227 2007 1772.89489 2008 1669.06218 2009 1661.02146 2010 1726.26456 2011 1807.6347 2012 1893.528 2013 1933.98396 2014 1965.78373