Year per 1,000 population at risk 2000 5.33166309479125 2001 5.3316615236478 2002 5.33166540587168 2003 5.33166271089821 2004 4.81186056076688 2005 5.18895658433425 2006 5.97919932017881 2007 5.33166195948767 2008 5.33166523592105 2009 5.33166275278061 2010 8.1611761672718 2011 7.33131618259862 2012 7.18169089447237 2013 6.03903442538083 2014 4.53919560319613 2015 4.01167974454538 2016 4.15256165418808 2017 2.81376272761687 2018 2.48064110151178 2019 2.87236340824017 2020 2.82977894811432 2021 2.96484588102544 2022 4.1942844387721