Year % of population 1999 25.585716009143145 2000 26.43505629843024 2001 27.011955724683563 2002 28.998657492267824 2003 30.365447593734924 2004 30.817448838499068 2005 31.92832617698148 2006 35.158963427386546 2007 34.88149094348188 2008 36.38618879915126 2009 37.762065000302435 2010 38.648207774752464 2011 39.93256203556842 2012 42.61744251346916 2013 43.42047333272654 2014 44.94277674315716 2015 47.08919479275188 2016 50.99908538265593 2017 54.4361536322367 2018 55.31608449618127 2019 57.09595507246223 2020 58.60697110335857 2021 60.13272121170001 2022 60.623421623433465