Year % (cumulative) 2000 11.2336435317993 2001 11.7280235290527 2002 12.301441192627 2003 13.2567749023438 2004 13.8015470504761 2005 13.7299633026123 2006 16.1657829284668 2007 15.5611801147461 2008 16.3661308288574 2009 17.2074203491211 2010 18.1269397735596 2011 18.8843402862549 2012 20.0518798828125 2013 20.3174095153809 2014 21.8331394195557 2015 21.2315502166748 2016 20.4710865020752 2017 20.4910659790039 2018 21.8083095550537 2019 22.2035808563232 2020 22.1598300933838 2021 22.0862102508545 2022 22.2154808044434