2016

6.5

2010

8.2

2017

7.3

2014

6.1

1997

7.9

2008

7.6

2015

7.4

2014

8.5

2004

7.9

1980

8.2

2000

7.4

1987

7.8

2019

7.8

2023

7.0

2013

8.1

2011

7.2

2015

7.6

2013

7.8

1994

8.7

1987

8.1