Year per 1,000 uninfected population ages 15-24 1990 25.87 1991 34.69 1992 42.46 1993 47.27 1994 48.6 1995 46.91 1996 43.4 1997 39.16 1998 34.99 1999 31.26 2000 28.08 2001 25.37 2002 23.06 2003 20.88 2004 18.73 2005 16.49 2006 14.7 2007 13.3 2008 12.08 2009 11.16 2010 10.56 2011 10.33 2012 9.54 2013 8.8 2014 8.53 2015 8.11 2016 7.2 2017 6.46 2018 5.56 2019 4.55 2020 4.08 2021 3.57 2022 3.15