2020
6.2
7
2019
7.8
6.3
7.9
7.1
6.8
5.3
6.1
6.7
7.3
2018
6.4
6.6
2015
2016
5.8
7.4
6.5
5.7
2017
7.2
5.5
2011
8.2
