2022

6.9

2014

6.2

2019

8.6

2020

4.8

2013

6.2

2015

7.1

2011

6.5

2017

6.8

1990

3.3

2016

6.1

2015

7.0

2010

6.4

2021

6.0

2019

6.5

1968

7.0

1981

5.0

1977

4.2

2012

5.8