Year	number of cases
2008	6662000
2009	5304000
2010	1411000
2011	1503000
2012	9110000
2013	2145000
2014	3428000
2015	3655000
2016	2400000
2017	1346000
2018	2675000
2019	5018000
2020	3856000
2021	4903000
2022	2507000
2023	528000