Year % of population 2000 19.963881761037054 2001 19.96914819765615 2002 21.580282430579885 2003 22.516962406465094 2004 23.753952841609376 2005 23.48737636595644 2006 25.198526917364667 2007 26.807287870995317 2008 25.947513029882664 2009 26.185912441294366 2010 27.402014356380477 2011 28.91159373156528 2012 31.666038423091727 2013 31.70305724194824 2014 31.860474023503993 2015 33.903800128646196 2016 38.85462442215109 2017 40.19989806819498 2018 43.017147983264664 2019 44.381259442868085 2020 46.264874557718755 2021 48.10086213419303 2022 48.71199459355673