1976

7.1

1997

7.5

1985

8.9

2022

8.5

1967

7.4

1991

7.8

2001

5.8

2002

6.1

2020

6.0

2012

6.8

2017

7.5

2003

7.2

1995

7.2

1986

8.0

2002

7.5

1999

7.4

2011

9.0

1997

7.4

2004

7.0

2006

7.6