Year % 2000 0.0230852360085135 2001 0.0229228868960975 2002 0.0177280521234457 2003 0.0179584730415442 2004 0.023948858331344 2005 0.0173553363052763 2006 0.0224640847203021 2007 0.0213419101171973 2008 0.0198750064737833 2009 0.0211931967900793 2010 0.0205915601866973 2011 0.0216530014238841 2012 0.0199658245706153 2013 0.0136549299181754 2014 0.0138557427109327 2015 0.0180306110920587 2016 0.0135687840835016 2017 0.0128361683252328 2018 0.0136948661195743 2019 0.0125383557655084 2020 0.0122073366654211