1999

7.5

1996

8.1

2012

6.3

1967

7.7

2004

7.9

2009

7.1

1983

8.0

1984

8.4

2004

7.1

2009

7.7

2012

7.4

2016

5.8

2017

7.5

2020

6.6

2008

7.6

2023

9.3

1985

7.9

2006

8.2

2020

7.6

2016

5.7