Year	number of cases
2008	18660000
2009	4031000
2010	15920000
2011	4490000
2012	5731000
2013	5924000
2014	3612000
2015	3602000
2016	7434000
2017	4463000
2018	4033000
2019	4034000
2020	5074000
2021	6037000
2022	3632000
2023	4702000