Year % of population ages 15-49 1990 0.9 1991 1.1 1992 1.2 1993 1.4 1994 1.5 1995 1.6 1996 1.6 1997 1.6 1998 1.6 1999 1.5 2000 1.5 2001 1.4 2002 1.3 2003 1.3 2004 1.2 2005 1.1 2006 1 2007 1 2008 1 2009 0.9 2010 0.9 2011 0.8 2012 0.8 2013 0.8 2014 0.7 2015 0.7 2016 0.7 2017 0.6 2018 0.6 2019 0.5 2020 0.5 2021 0.5 2022 0.4