Year % of population ages 15-49 1990 0.2 1991 0.3 1992 0.3 1993 0.4 1994 0.4 1995 0.4 1996 0.5 1997 0.5 1998 0.5 1999 0.5 2000 0.5 2001 0.5 2002 0.6 2003 0.6 2004 0.6 2005 0.6 2006 0.6 2007 0.6 2008 0.6 2009 0.6 2010 0.6 2011 0.6 2012 0.6 2013 0.6 2014 0.6 2015 0.6 2016 0.6 2017 0.6 2018 0.6 2019 0.6 2020 0.5 2021 0.5 2022 0.5