Year	per 1,000 uninfected population ages 15-49
1990	20.3
1991	21.6
1992	22.2
1993	22.1
1994	21.4
1995	20.5
1996	19.1
1997	17.9
1998	16.6
1999	15
2000	13.8
2001	12.9
2002	12.1
2003	11.3
2004	10.6
2005	9.8
2006	9
2007	8.3
2008	7.7
2009	7.3
2010	7.1
2011	6.8
2012	6.4
2013	6
2014	5.7
2015	5.4
2016	5.1
2017	4.7
2018	4.4