Year per 1,000 uninfected population ages 15-49 1990 3.01188909321117 1991 3.14394803410715 1992 3.13181111632514 1993 3.02800158454501 1994 2.89598605729991 1995 2.75360767866482 1996 2.63045731738324 1997 2.52884812375215 1998 2.40220764424818 1999 2.27849258268758 2000 2.1541023492355 2001 2.02545625084847 2002 1.90279672752126 2003 1.80958115468871 2004 1.71957475380808 2005 1.63819597981332 2006 1.56046603839105 2007 1.50223477854103 2008 1.45826108118821 2009 1.40515827150484 2010 1.35368166766665 2011 1.30700997441804 2012 1.26788614825131 2013 1.20308162667902 2014 1.15763587226821 2015 1.0995932193881 2016 1.05528161032413 2017 1.00227413373678 2018 0.953861628995556