Year	per 1,000 uninfected population ages 15-49
1990	9.2
1991	7.8
1992	7.8
1993	5.9
1994	5.4
1995	4.6
1996	4.2
1997	3.7
1998	3.5
1999	3.6
2000	3.2
2001	3
2002	2.8
2003	2.7
2004	2.4
2005	2.6
2006	2.3
2007	2.2
2008	2.2
2009	2.3
2010	2.1
2011	2.1
2012	2
2013	1.9
2014	1.9
2015	1.8
2016	1.7
2017	1.6
2018	1.6