Year per 1,000 uninfected population ages 15-49 1990 3.34522777596732 1991 3.52670608882585 1992 3.5371394244821 1993 3.41021448450791 1994 3.21699070908805 1995 2.98545762204261 1996 2.77399146429928 1997 2.57694355173661 1998 2.39470558623335 1999 2.21704889696108 2000 2.06551436679971 2001 1.91694097674319 2002 1.78318878346845 2003 1.67105159935654 2004 1.57460106969241 2005 1.49642256229158 2006 1.41074588440603 2007 1.34810145394878 2008 1.29689516202658 2009 1.25808293919842 2010 1.19409183169988 2011 1.14846140792481 2012 1.10754803688933 2013 1.06785385150334 2014 1.02950451772191 2015 0.980415839017235 2016 0.942325086537558 2017 0.902500148316544 2018 0.863080179030704