A2

  A* A*/A A*/B A*/C
2021 23.9% 56.7% 83.6% 97%
2020 27.1% 71.4% 84.5% 95.7%
2019 13.8% 43.6% 78.7% 93.6%
2018 7.9% 36.8% 66.4% 87.5%
2017 9.4% 31.6% 62.4% 83.8%