Year Percent 1994-01-01 1877.37239517572000 1995-01-01 176.15529894237000 1996-01-01 39.18254236541110 1997-01-01 17.40804106073570 1998-01-01 7.14632665452333 1999-01-01 8.29602765342569 2000-01-01 13.18089058657310 2001-01-01 8.35413777161341 2002-01-01 5.83692452105643 2003-01-01 6.43821810118942 2004-01-01 6.88205438981899 2005-01-01 7.57999929125766 2006-01-01 8.72169386091736 2007-01-01 10.84683620755580 2008-01-01 17.13989977720700 2009-01-01 7.31607858288585 2010-01-01 7.40046356341408 2011-01-01 8.45290466176792 2012-01-01 5.19568369035063 2013-01-01 5.94283871648424 2014-01-01 6.84944977003358 2015-01-01 6.67828585615241 2016-01-01 14.36109423862470 2017-01-01 7.44266321306795