Year % of population 2000 98.6 2001 98.6 2002 98.6 2003 98.7 2004 98.7 2005 98.7 2006 98.8 2007 98.9 2008 99 2009 99.3 2010 99.5 2011 99.5 2012 99.8 2013 99.6 2014 99.7 2015 99.9 2016 99.9 2017 100 2018 100 2019 100 2020 100 2021 100 2022 100