Year % of population 1990 0.04882469308367077 1991 0.078810516480602 1992 0.12518632906821636 1993 0.1790066795612269 1994 0.3605081489994313 1995 0.6830820605320995 1996 1.326567157770976 1997 2.042697057650039 1998 3.140579597723217 1999 4.632902784256467 2000 6.743719511647931 2001 8.053555972903956 2002 10.518528420417383 2003 12.195854587379014 2004 14.081818572061076 2005 15.674661470168665 2006 17.426420715017162 2007 20.35453684558482 2008 23.006835501859147 2009 25.560005264160992 2010 28.797653077535873 2011 31.211965092393644 2012 33.7133614270398 2013 35.64925751867193 2014 37.88078096603534 2015 40.2700586394911 2016 43.215980241478306 2017 45.543073180761695 2018 49.157563210755384 2019 53.74888436660314 2020 59.56913843578928 2021 63.0713482972497