1979

7.3

1992

6.9

2004

8.3

1984

7.0

2025

7.4

2007

8.2

1998

7.2

2022

8.1

2023

7.6

2004

8.6

1992

7.9

2016

9.3

1972

7.4

1993

6.6

2011

7.6

1973

6.8

2004

7.5

2014

6.8

2016

6.8

2009

6.8