Year % of population ages 15-49 1990 5.5 1991 6.8 1992 8.1 1993 9 1994 9.6 1995 9.9 1996 10 1997 9.8 1998 9.5 1999 9.2 2000 8.7 2001 8.3 2002 7.8 2003 7.3 2004 6.9 2005 6.6 2006 6.3 2007 6.1 2008 5.9 2009 5.7 2010 5.6 2011 5.5 2012 5.4 2013 5.2 2014 5.1 2015 4.9 2016 4.8 2017 4.6 2018 4.4 2019 4.2 2020 4 2021 3.9 2022 3.7