Year % 2000 0.0129188447545065 2001 0.0136421555887458 2002 0.0144171816502786 2003 0.0147169055326191 2004 0.0148129263129566 2005 0.0157410929861889 2006 0.0152443597554359 2007 0.0146738817017305 2008 0.022188702950093 2009 0.0219102956009014 2010 0.0207495390816671 2011 0.0206145025346647 2012 0.0205502758447799 2013 0.0199513839655113 2014 0.0202987281162972 2015 0.020261384148773 2016 0.0217568129460498 2017 0.0218481651072605 2018 0.0152818696982919 2019 0.0155035295884585 2020 0.015309248752025