Year	Percent
2000-01-01	5.57514978731687
2001-01-01	5.01318986435507
2002-01-01	5.13210590403958
2003-01-01	4.96674336685037
2004-01-01	4.69094765484938
2005-01-01	4.74925986822703
2006-01-01	5.34878935064746
2007-01-01	5.26247819409392
2008-01-01	5.61257995156886
2009-01-01	7.53672261023311
2010-01-01	7.78664830215475
2011-01-01	8.03633523962114
2012-01-01	7.88616059644404
2013-01-01	7.52588948434741
2014-01-01	6.11135133983609
2015-01-01	5.30193431054949
2016-01-01	4.81341889055992
2017-01-01	4.33513828069665