Year per 1,000 uninfected population ages 15-49 1990 21.92 1991 23.58 1992 24.34 1993 24.68 1994 24.13 1995 22.57 1996 20.78 1997 19.27 1998 17.66 1999 15.23 2000 14.73 2001 13.18 2002 12.01 2003 11 2004 10.13 2005 9.33 2006 8.51 2007 7.83 2008 7.73 2009 6.75 2010 6.58 2011 6.32 2012 5.91 2013 5.42 2014 4.97 2015 4.54 2016 3.99 2017 3.36 2018 2.72 2019 2.26 2020 1.98 2021 1.63 2022 1.3