Year % of population ages 15-49 1990 0.1 1991 0.1 1992 0.1 1993 0.2 1994 0.4 1995 0.6 1996 0.8 1997 1 1998 1.2 1999 1.2 2000 1.2 2001 1.2 2002 1.2 2003 1.1 2004 1.1 2005 1 2006 1 2007 1 2008 0.9 2009 0.9 2010 0.9 2011 0.9 2012 0.8 2013 0.8 2014 0.8 2015 0.7 2016 0.7 2017 0.7 2018 0.6 2019 0.6 2020 0.6 2021 0.5 2022 0.5