Year % ages 15-24 1990 0.1 1991 0.1 1992 0.1 1993 0.1 1994 0.3 1995 0.4 1996 0.5 1997 0.6 1998 0.7 1999 0.7 2000 0.7 2001 0.7 2002 0.6 2003 0.6 2004 0.6 2005 0.5 2006 0.4 2007 0.4 2008 0.3 2009 0.3 2010 0.3 2011 0.2 2012 0.2 2013 0.2 2014 0.2 2015 0.2 2016 0.1 2017 0.1 2018 0.1