Year % 2000 0.0309411220554971 2001 0.0315020790340904 2002 0.0317699852991527 2003 0.0304973649201512 2004 0.0306392790344631 2005 0.0303684738160561 2006 0.0308050279970019 2007 0.0260963408517101 2008 0.0273029513298723 2009 0.0276672002818151 2010 0.0255607043374936 2011 0.0230533115327303 2012 0.0173342208362333 2013 0.0161138514266065 2014 0.0167204543825215 2015 0.0165900255295401 2016 0.0127076251299704 2017 0.0131456976285749 2018 0.0142082630028324 2019 0.0153771505553507 2020 0.0125088452379209