8.6
ja
2012
7.4
2009
7.5
en
N/A
bn
2024
8.2
ko
2019
9.2
th
2025
8.0
2015
8.5
zh
2011
7.6
2022
7.2
2016
1975
1.0
6.6
de
5.1
7.9
8.3
2023
6.1
1986