6.2
en
2017
3.8
2014
8.5
2009
5.4
2015
6.5
2013
5.2
1999
7.1
ko
8.0
2012
ja
1985
7.8
8.1
5.7
1993
hi
2008
5.8
4.7
cn
1997
6.3
6.9
1966
1994
zh
2011