"Year" "Number of Cases" "2001" "2" "2004" "1" "2008" "2" "2009" "2" "2010" "2" "2011" "1" "2012" "6" "2013" "5" "2014" "7" "2015" "9" "2016" "9" "2017" "19" "2018" "16" "2019" "13" "2020" "3"