7.6
en
2012
8.4
ko
2016
7.7
2020
7.8
1988
7.1
zh
2025
N/A
1963
8.2
2021
ja
2024
6.8
2013
7.0
1994
es
1970
8.0
6.3
1986
6.6
fr
1984
5.0
2019
7.3
1990
7.2
1996