Year	Percent
1994-01-01	14.08328625187940
1995-01-01	13.77711547149820
1996-01-01	12.65887704424310
1997-01-01	12.83495845475630
1998-01-01	13.14343623707110
1999-01-01	16.41848782775750
2000-01-01	18.55350399116380
2001-01-01	18.71374757161540
2002-01-01	18.70538798307230
2003-01-01	17.74481728589680
2004-01-01	19.18481889705440
2005-01-01	17.22579137318620
2006-01-01	14.73843451262910
2007-01-01	12.68171922019270
2008-01-01	10.93226225360580
2009-01-01	12.82121831131110
2010-01-01	14.60049143932420
2011-01-01	13.62776419398760
2012-01-01	14.52412025151940
2013-01-01	14.52508198983190
2014-01-01	13.63353446732970
2015-01-01	12.89284470027740
2016-01-01	10.75668358709050
2017-01-01	8.40825378850073