Year % (cumulative) 2004 16.1517696380615 2005 16.5154304504395 2006 20.5488605499268 2007 17.2517700195312 2008 19.0390090942383 2009 19.3069305419922 2010 20.0598392486572 2011 20.1265201568604 2012 20.7841796875 2013 22.860990524292 2014 22.0408191680908 2015 21.9686603546143 2016 23.381290435791 2017 24.3390674591064 2018 25.4520206451416 2019 26.6028995513916 2020 28.1820755004883 2021 28.1357021331787 2022 28.4674682617188