7.1
2021
6.1
2020
6.9
2020
7.4
2020
7.0
2020
7.8
2019
7.4
2019
7.3
2019
7.5
2019
7.6
2018
6.0
2018
6.5
2018
6.1
2018
7.6
2018
6.2
2018
7.3
2018
6.4
2018
1.0
2017
5.5
2017
5.8
2017
5.3
2016
7.0
2016
6.0
2016
4.4
2016
7.1
2015
6.9
2015
8.4
2015
7.8
2015
2.9
2015
7.3
2014
5.0
2014
6.8
2014
7.0
2013
7.2
2013
5.6
2013
6.8
2013
7.3
2013
6.3
2012
7.7
2012
8.1
2012
7.6
2012
8.2
2012
8.1
2011
8.1
2011
7.3
2011
