Year	per 1,000 uninfected population ages 15-49
1990	2.7
1991	3.3
1992	4.1
1993	5
1994	5.8
1995	6.4
1996	7
1997	7.3
1998	7.3
1999	7.1
2000	6.5
2001	6
2002	5.5
2003	4.8
2004	4.5
2005	4.1
2006	3.8
2007	3.6
2008	3.4
2009	3.2
2010	3
2011	2.8
2012	2.6
2013	2.4
2014	2.3
2015	2.2
2016	2
2017	1.8
2018	1.6