Year % of population 1990 0 1991 0.0010335310823220744 1992 0.003006454291408437 1993 0.008725655997831313 1994 0.018914047485854096 1995 0.05162690955806829 1996 0.07223992115792195 1997 0.13494576309273137 1998 0.24444651395622996 1999 0.3732642094074158 2000 0.5160814591715804 2001 0.6553119852603438 2002 0.8375851152470318 2003 1.1132618313998615 2004 1.4926501142036914 2005 2.0132204805788034 2006 2.6553257777812833 2007 3.3661405682563044 2008 3.66493829912678 2009 4.312998100239414 2010 6.1340594506333295 2011 7.592752850860426 2012 9.280810235362097 2013 11.155259696517899 2014 13.36505417961024 2015 16.00779868694331 2016 18.632633842234192 2017 21.26664410442744 2018 24.820795560502866 2019 27.760463345125714 2020 31.820209911875118 2021 35.85728551011761