Year per 1,000 uninfected population 1990 4.857991723495373 1991 5.267627513679675 1992 5.506480401547722 1993 5.608438156867635 1994 5.576566829199036 1995 5.424191110022879 1996 5.275788126763076 1997 5.121692395431847 1998 4.919526389028889 1999 4.7072154603593965 2000 4.505973639551044 2001 4.268447546801149 2002 4.045435961624623 2003 3.848885823659513 2004 3.660555411468658 2005 3.447332985327417 2006 3.226489630745008 2007 3.0175221657160867 2008 2.8270120857296317 2009 2.6495948872309962 2010 2.4979414340365937 2011 2.331456041825385 2012 2.168362020887388 2013 2.022907026630804 2014 1.8645264733353768 2015 1.6968576740681744 2016 1.5532869319962894 2017 1.3764226551261367 2018 1.2323028535733913 2019 1.1039106388813849 2020 0.9926743878323386 2021 0.8877848850624316 2022 0.7759226093168118