Year % of population 1990 0 1991 0.0010333900629440696 1992 0.0030060510931948924 1993 0.008724506494451766 1994 0.018911592717831056 1995 0.05162030353161927 1996 0.07231788564188285 1997 0.1350885355292046 1998 0.24472711455321164 1999 0.37397653286120514 2000 0.5169095377062386 2001 0.6565449400511982 2002 0.8391686173928926 2003 1.1148329480009387 2004 1.4952702723351508 2005 2.015888471554294 2006 2.6591570317347424 2007 3.369998385689231 2008 3.6691018684490007 2009 4.312998100239414 2010 6.137967843995746 2011 7.596635252030017 2012 9.284887420076767 2013 11.159389096957346 2014 13.368985426335533 2015 16.011709929933584 2016 18.63630830755041 2017 21.27023290200951 2018 24.82527019758937 2019 27.764922344198585 2020 31.824289506469682 2021 35.861738732934576