Year per 1,000 population at risk 2000 34.1637459516288 2001 34.1637499429726 2002 34.1637518614564 2003 34.1637393508829 2004 34.1637537880152 2005 34.163752437236 2006 24.2956940340715 2007 30.4491938784138 2008 37.0696323817222 2009 34.9462230254279 2010 35.0255083224658 2011 30.5785754897021 2012 40.0967432032675 2013 13.8652942736129 2014 8.62320494663919 2015 6.0561816003745 2016 3.5838951564685 2017 2.6506848076194 2018 2.36854138726468 2019 1.6949563697941 2020 1.76483364008733 2021 6.24808052396002 2022 12.37156396289