Year	number of cases
2008	1000
2009	7500
2010	1000
2011	10000
2012	16000
2013	13000
2014	1200
2015	5700
2016	3200
2017	31000
2018	11000
2019	25000
2020	51000
2021	49000
2022	17000
2023	4700