Year	per 1,000 uninfected population
1990	9.58
1991	10.69
1992	10.92
1993	10.39
1994	9.37
1995	8.07
1996	7.11
1997	6.3
1998	5.62
1999	5.14
2000	4.72
2001	4.31
2002	3.96
2003	3.62
2004	3.4
2005	3.09
2006	2.82
2007	2.6
2008	2.23
2009	2.14
2010	1.94
2011	1.69
2012	1.59
2013	1.47
2014	1.28
2015	1.04
2016	0.88
2017	0.79
2018	0.66
2019	0.63
2020	0.6
2021	0.54
2022	0.46