Year % of population ages 15-49 1990 0.2 1991 0.3 1992 0.4 1993 0.6 1994 0.9 1995 1.2 1996 1.7 1997 2.2 1998 2.8 1999 3.4 2000 3.8 2001 4.2 2002 4.4 2003 4.5 2004 4.5 2005 4.4 2006 4.3 2007 4.2 2008 4.1 2009 4 2010 3.9 2011 3.8 2012 3.7 2013 3.6 2014 3.4 2015 3.3 2016 3.2 2017 3.1 2018 2.9 2019 2.8 2020 2.7 2021 2.5 2022 2.4