5.4

1970

7.7

2017

8.2

1990

6.2

2011

7.1

1977

5.3

2012

6.4

2021

7.4

2007

5.7

2014

6.6

2009

6.2

2011

5.5

2019

7.0

2017

5.4

2015

7.4

2016

6.7

2011

9.5

2016

7.3

2018

6.0