1987

7.0

2019

7.1

1985

7.9

2010

6.7

2017

7.1

2018

7.5

2001

8.3

2018

8.6

2004

7.2

2008

7.9

2017

5.8

2008

8.8

2017

7.7

1958

6.9

2017

8.0

2015

6.8

2024

8.5

2014

8.4

2014

8.6