Year % of population 1990 0 1991 0.0024625023344724503 1992 0.008876126015711335 1993 0.019015429588140263 1994 0.0397146978397513 1995 0.09349550713876079 1996 0.28763041214676904 1997 0.575713484732804 1998 1.1376884925718558 1999 1.8330911546947968 2000 3.3537577807214207 2001 5.064803690196464 2002 8.48661942164373 2003 10.854002967868388 2004 14.16403891309695 2005 16.268029203246844 2006 20.502279866484024 2007 23.37230495898912 2008 25.972928550383727 2009 30.391535537634592 2010 34.01455281683149 2011 38.68067815572771 2012 42.2111392668873 2013 45.15226490484783 2014 47.73021698748543 2015 53.35812920762048 2016 56.4425206208319 2017 59.337101665424385 2018 62.760786385176544 2019 68.05264456296841 2020 73.44923166730338 2021 75.59261708172012