Year	number of cases
2008	29236540
2009	13686340
2010	26981100
2011	11995700
2012	19416530
2013	17057210
2014	15823253
2015	11335452
2016	17725211
2017	10544006
2018	12057633
2019	15419219
2020	16569752
2021	19100290
2022	13802960
2023	14574161