Year % of population 2000 31.7545561183875 2001 31.7415215472398 2002 31.7308543082929 2003 31.7201883323159 2004 31.7089302006926 2005 32.7395779664836 2006 33.7706619827124 2007 34.8021835185737 2008 35.8341434516428 2009 36.8591179358119 2010 37.8802570165898 2011 38.8970353654873 2012 39.9104998416853 2013 40.9271667940676 2014 41.9466985965934 2015 42.9687651734413 2016 43.9930330008888 2017 45.0191783233948 2018 46.0473416259177 2019 47.0767255901086 2020 48.1070226075146 2021 49.1692326810418 2022 50.2351809434902