Year per 1,000 uninfected population ages 15-49 1990 4.9705360752654 1991 6.94233278377062 1992 9.15119594405793 1993 11.4602070214287 1994 13.5180602272106 1995 14.8655483980875 1996 15.2901547367985 1997 14.8897401436056 1998 13.9604116548432 1999 12.8246770584123 2000 11.8099316707522 2001 10.6854395921067 2002 9.64093265036626 2003 8.88642139993976 2004 8.27364249841325 2005 7.78162865120366 2006 7.38773796832123 2007 7.13926607841876 2008 6.90301020026225 2009 6.6819402680431 2010 6.34568001831049 2011 6.00025802444003 2012 5.75665154438575 2013 5.51659236685153 2014 5.21431347812724 2015 4.9831589231635 2016 4.67830103425284 2017 4.32593396239806 2018 4.01985358944362