1976

7.9

2002

7.5

2007

7.4

1985

7.8

1997

7.1

1972

7.7

1998

6.8

2016

7.7

2020

8.5

1962

7.2

2019

8.5

2018

7.8

2002

6.8

2012

8.4

2007

7.3

1997

6.9

1964

8.0

2008

8.9

2022

8.2

2007

7.9