Year	Percent
1999-01-01	2.77940270290330
2000-01-01	2.35946030916925
2001-01-01	2.43049324155156
2002-01-01	2.44749882048365
2003-01-01	2.79393408893321
2004-01-01	2.94526361491578
2005-01-01	2.55423978973702
2006-01-01	1.92329898966868
2007-01-01	1.97894234987442
2008-01-01	1.82557844499589
2009-01-01	3.77459506378898
2010-01-01	4.69859658375652
2011-01-01	4.27814571593291
2012-01-01	4.14013019792085
2013-01-01	3.66666302434081
2014-01-01	3.49054899434634