2011

6.2

2017

7.3

2014

8.5

2015

7.6

1968

8.1

2016

8.2

2019

7.8

1997

7.9

1989

8.3

1994

8.5

2016

7.9

1994

8.7

2016

6.7

2018

7.4

2015

7.6

2023

7.0

2016

7.0

2010

7.7

2016

6.3

2016

7.9