2007

7.2

1976

7.8

2014

6.6

2013

7.5

1988

8.1

1983

8.4

2010

7.7

2018

7.0

2017

7.7

2021

7.6

2016

7.2

2014

8.3

1975

6.9

2018

8.0

2004

7.9

2017

7.5

2023

6.8

2015

7.7

1972

7.9

2006

7.4