Year	per 1,000 uninfected population
1990	3.87
1991	7.59
1992	12.91
1993	18.91
1994	23.4
1995	25.36
1996	24.68
1997	23.86
1998	22.32
1999	21.82
2000	20.96
2001	20.48
2002	20
2003	19.73
2004	19.76
2005	18.95
2006	18.19
2007	17.65
2008	17.52
2009	17.03
2010	15.71
2011	15.82
2012	15.96
2013	16.02
2014	15.29
2015	12.52
2016	9.58
2017	8.27
2018	8.03
2019	7.16
2020	5.36
2021	5.13
2022	4.1