Year	Percent
1999-01-01	44.5278679993875
2000-01-01	45.2783306192306
2001-01-01	46.0103683239721
2002-01-01	45.6009995005844
2003-01-01	44.9499266450709
2004-01-01	47.2503928453289
2005-01-01	47.4763430823900
2006-01-01	47.9185459401616
2007-01-01	48.8949066320913
2008-01-01	49.0023673267792
2009-01-01	48.1327442187770
2010-01-01	47.1681999389213
2011-01-01	45.6345151437054
2012-01-01	44.9328771037877
2013-01-01	43.9981187184484
2014-01-01	44.4708383044291