Year Measure 1995 13.51661 1996 20.03593 1997 24.25663 1998 26.64312 1999 30.20961 2000 32.75086 2001 36.52497 2002 50.33745 2003 51.50499 2004 55.72832 2005 66.76613 2006 80.74518 2007 100.60912 2008 114.62116 2009 127.96121 2010 144.31739 2011 165.15469 2012 207.28347 2013 221.5981 2014 271.43324