Year	per 1,000 uninfected population
1990	11.7
1991	12.69
1992	13.22
1993	13.57
1994	13.49
1995	12.85
1996	12.12
1997	11.49
1998	10.77
1999	9.58
2000	9.24
2001	8.43
2002	7.78
2003	7.19
2004	6.63
2005	6.1
2006	5.56
2007	5.1
2008	4.76
2009	4.2
2010	4.06
2011	3.75
2012	3.47
2013	3.19
2014	2.92
2015	2.63
2016	2.31
2017	1.92
2018	1.52
2019	1.31
2020	1.13
2021	0.97
2022	0.81