Year	per 1,000 uninfected population ages 15-49
1990	14.3
1991	13.8
1992	12.4
1993	11.3
1994	10.3
1995	9.9
1996	8.7
1997	8
1998	7.2
1999	6.6
2000	6.2
2001	5.7
2002	5.3
2003	5
2004	4.7
2005	4.4
2006	4.2
2007	3.9
2008	3.7
2009	3.5
2010	3.3
2011	3.1
2012	3
2013	2.8
2014	2.7
2015	2.5
2016	2.3
2017	2.1
2018	2