1975

4.5

5.0

2015

6.4

2021

6.2

1998

6.2

1974

6.3

2014

5.9

2004

9.5

2011

9.5

6.4

2004

9.9

2004

6.1

2022

7.8

1976

5.9

5.6

1993

6.2

2011

6.4

1967

6.4

2012

5.7

2018

6.0