Year % (cumulative) 1998 0.125585809350014 1999 0.233139470219612 2000 0.227873474359512 2001 0.283951312303543 2002 0.908628284931183 2003 0.320453494787216 2004 0.478062838315964 2005 0.552123248577118 2006 0.459514975547791 2007 0.574899315834045 2008 0.902733981609344 2009 1.02376019954681 2010 1.58524262905121 2011 2.08656120300293 2012 2.46372652053833 2013 2.59913015365601 2014 16.3553104400635 2015 16.2984600067139 2016 17.3112907409668 2017 17.550910949707 2018 17.4163398742676 2019 17.146110534668 2020 16.9066276550293 2021 18.048131942749 2022 18.0060958862305