Year number of cases 2009 1118590 2010 1692350 2011 603100 2012 5940720 2013 1594498 2014 651050 2015 1108287 2016 1081450 2017 2551842 2018 2609186 2019 3376750 2020 4409612 2021 2578690 2022 7422080 2023 6029739