Year Measure 1990 2282.8658 1991 2198.36192 1992 1998.28557 1993 2062.93575 1994 1668.97564 1995 1562.32176 1996 1438.88617 1997 1171.49631 1998 1554.10349 1999 1411.51224 2000 1692.15641 2001 1782.83466 2002 1776.35498 2003 1746.23116 2004 1913.7228 2005 2051.67961 2006 2115.54633 2007 2254.35137 2008 2316.56227 2009 2353.458 2010 2382.05224 2011 2412.03186 2012 2428.88972 2013 2540.86772 2014 2678.80615