Year Number of Cases
2000 4
2001 3
2002 5
2003 1
2004 5
2005 3
2006 5
2007 3
2008 2
2010 4
2011 14
2012 6
2013 9
2014 8
2015 4
2016 5
2017 6
2018 13
2019 13
2020 16
2021 21
2022 17
2023 20