Year	per 1,000 uninfected population ages 15-49
1990	2.9
1991	3.5
1992	4.2
1993	5
1994	5.5
1995	5.9
1996	6.2
1997	6.2
1998	6
1999	5.4
2000	5.1
2001	4.6
2002	4.1
2003	3.8
2004	3.6
2005	3.3
2006	3.1
2007	3
2008	2.9
2009	2.9
2010	2.7
2011	2.6
2012	2.5
2013	2.3
2014	2.1
2015	2
2016	1.8
2017	1.6
2018	1.5