Year	per 1,000 uninfected population ages 15-49
1990	7.1
1991	9.9
1992	13.2
1993	17.2
1994	21
1995	23.8
1996	25
1997	24.3
1998	22.4
1999	19.8
2000	17.7
2001	15.8
2002	14.4
2003	13.4
2004	12.5
2005	11.7
2006	10.9
2007	10.1
2008	9.5
2009	9.3
2010	9
2011	8.2
2012	7.8
2013	7.6
2014	6.5
2015	6.1
2016	5.7
2017	5.4
2018	4.9