Year % of population 2000 19.891568484510273 2001 20.13509703307782 2002 20.383602585007285 2003 20.69353184951126 2004 21.06615160241177 2005 21.479264976744318 2006 21.86382925520791 2007 22.353048994689313 2008 22.931147685149405 2009 23.387805323816675 2010 24.04340599487008 2011 24.54699108488693 2012 25.22279259584762 2013 25.90472367552181 2014 26.59828375409719 2015 27.33974811489225 2016 28.327523522935422 2017 29.106785835477158 2018 29.9733212467722 2019 30.76492815655719 2020 31.715876246046182 2021 32.49245834154762 2022 33.224883356277466