Year per 1,000 uninfected population ages 15-24 1990 6.918162915278751 1991 7.50189574523193 1992 7.899384861358227 1993 8.068021695567577 1994 8.017659853726824 1995 7.7815717214224716 1996 7.51889228495007 1997 7.244326333000629 1998 6.913319733990242 1999 6.561098585134393 2000 6.232207012250026 2001 5.86197879629104 2002 5.519979031959714 2003 5.193640059182232 2004 4.886420876685309 2005 4.570979383452485 2006 4.307394685777722 2007 4.067231705901669 2008 3.86122627262266 2009 3.662434671077306 2010 3.4673065691058875 2011 3.2620660382742708 2012 3.056361385771577 2013 2.84213865701334 2014 2.610622700537752 2015 2.388725785946143 2016 2.1550249775404104 2017 1.9082149947369969 2018 1.721703579327486 2019 1.5424054095229671 2020 1.381015854160895 2021 1.2301228586902753 2022 1.066967123039651