Year Measure 1990 2937.65635 1991 2104.94869 1992 1109.89127 1993 706.21348 1994 891.1532 1995 955.58668 1996 1121.58096 1997 1378.57298 1998 1766.97147 1999 1826.7583 2000 2021.92579 2001 2059.77593 2002 2082.99842 2003 2223.4588 2004 2311.38234 2005 2379.46017 2006 2375.73119 2007 2375.4637 2008 2979.06339 2009 2883.44431 2010 3141.51964 2011 3318.63595 2012 3437.85977 2013 3414.14797 2014 3365.67394