Year	Percent
1995-01-01	4.31916268271728
1996-01-01	4.77002878052637
1997-01-01	5.64360725788676
1998-01-01	6.61137619997950
1999-01-01	7.24773107568262
2000-01-01	7.08404357804146
2001-01-01	7.47505927305528
2002-01-01	8.54566816891730
2003-01-01	8.58613031421094
2004-01-01	8.13689323470895
2005-01-01	7.38125258297646
2006-01-01	6.63516337244905
2007-01-01	5.68480035018137
2008-01-01	4.96819048692048
2009-01-01	6.57477687759045
2010-01-01	5.85817326346241
2011-01-01	4.91983374495179
2012-01-01	5.82568211939896
2013-01-01	5.34895093533973
2014-01-01	5.05181415353271
2015-01-01	4.40679258402346
2016-01-01	4.00934896493520
2017-01-01	3.64079042305473