Year % of population 1990 0 1991 0 1992 0 1993 5.668855662023E-06 1994 0.000203584583233516 1995 0.0009682317323384841 1996 0.007407121390806283 1997 0.021566834832060604 1998 0.04065509792404292 1999 0.07991280871326945 2000 0.16885112900267002 2001 0.3927971612317174 2002 0.7388384815958706 2003 1.3159926374431314 2004 1.7303358768779684 2005 2.223524018669494 2006 2.9120509206637832 2007 3.6716161409359134 2008 4.10827733064195 2009 4.837284634604608 2010 5.913091375920925 2011 6.78281721969064 2012 7.918718194507847 2013 9.356463852264083 2014 11.860410729125128 2015 14.207927822907063 2016 17.343975278024008 2017 20.095631914987713 2018 23.258695196331907 2019 26.527099695673503 2020 30.560731147493396 2021 34.99881753196125