Year % of population ages 15-49 1990 3.3 1991 3.8 1992 4.2 1993 4.5 1994 4.7 1995 4.9 1996 4.9 1997 5 1998 5 1999 4.9 2000 4.8 2001 4.7 2002 4.6 2003 4.4 2004 4.2 2005 4.1 2006 4 2007 3.9 2008 3.8 2009 3.7 2010 3.7 2011 3.6 2012 3.5 2013 3.4 2014 3.3 2015 3.2 2016 3.1 2017 2.9 2018 2.8 2019 2.7 2020 2.6 2021 2.4 2022 2.3