8.1
ja
2015
5.0
2021
8.3
en
2025
5.3
2024
8.5
2019
6.7
ko
7.9
2023
6.6
6.8
zh
2022
5.8
7.2
2018
6.9
2001
7.0
7.5
1989
7.4
1990
2009
8.2
2004