Year % of population ages 15-49 1990 4.6 1991 5.4 1992 6.1 1993 6.8 1994 7.3 1995 7.7 1996 7.9 1997 8 1998 7.9 1999 7.8 2000 7.6 2001 7.3 2002 7 2003 6.7 2004 6.3 2005 6 2006 5.7 2007 5.4 2008 5.2 2009 5 2010 4.9 2011 4.7 2012 4.5 2013 4.3 2014 4.1 2015 4 2016 3.9 2017 3.8 2018 3.7 2019 3.6 2020 3.5 2021 3.5 2022 3.4