Year number of cases 2008 2862835 2010 2991800 2012 5775200 2013 1488146 2014 678140 2015 2378020 2016 1766390 2017 2404364 2018 2760700 2019 3506663 2020 4136520 2021 2988325 2022 6844985 2023 6699935