Year % ages 15-24 1990 0.7 1991 0.8 1992 0.9 1993 0.9 1994 0.9 1995 0.9 1996 0.8 1997 0.8 1998 0.8 1999 0.7 2000 0.7 2001 0.6 2002 0.6 2003 0.6 2004 0.5 2005 0.5 2006 0.5 2007 0.5 2008 0.5 2009 0.5 2010 0.5 2011 0.5 2012 0.4 2013 0.4 2014 0.4 2015 0.4 2016 0.4 2017 0.4 2018 0.3 2019 0.3 2020 0.3 2021 0.3 2022 0.3