Year per 1,000 uninfected population ages 15-49 1990 3.92981669637512 1991 4.21228892965484 1992 4.26131865368955 1993 4.10957579468198 1994 3.82028140893169 1995 3.44702475500892 1996 3.08714147049422 1997 2.74278409147277 1998 2.47242142619316 1999 2.21750179948287 2000 2.01370014351136 2001 1.83633400643388 2002 1.68571943691919 2003 1.54022000281024 2004 1.43863216862846 2005 1.36926463385287 2006 1.27048916635107 2007 1.19821300617912 2008 1.13732431260004 2009 1.12373512749909 2010 1.03085404386905 2011 0.984160863417027 2012 0.941447709888118 2013 0.941220465119637 2014 0.905280234348894 2015 0.868097397389159 2016 0.836825332934099 2017 0.812499467871098 2018 0.786944406016493