Year % (cumulative) 2000 11.6697797775269 2001 11.7199087142944 2002 12.3624124526978 2003 12.7224264144897 2004 13.7841863632202 2005 13.2879066467285 2006 15.9850006103516 2007 14.550009727478 2008 14.7644195556641 2009 15.1701803207397 2010 15.6068601608276 2011 16.6810207366943 2012 17.4898109436035 2013 17.5419406890869 2014 18.0281600952148 2015 17.2221908569336 2016 16.8859119415283 2017 17.1050491333008 2018 18.1612205505371 2019 17.4985809326172 2020 17.8804092407227 2021 18.4932308197021 2022 18.2590007781982