Year Measure 1990 5334.90545 1991 5087.45247 1992 4943.15547 1993 4950.9325 1994 5240.16019 1995 5312.90455 1996 5365.50828 1997 5434.6622 1998 5574.70647 1999 5675.61503 2000 5777.99565 2001 6006.34519 2002 6380.9519 2003 6578.03424 2004 6830.70507 2005 6917.86047 2006 7123.53777 2007 7137.82418 2008 6920.24404 2009 6104.42184 2010 6510.84188 2011 6753.07366 2012 6718.97505 2013 6779.28089 2014 6727.9993