1996

5.6

2005

5.7

1981

7.2

1986

7.0

2007

6.9

2014

6.1

2007

7.3

1989

5.5

2017

7.4

1993

7.4

2007

5.2

1974

7.0

2005

7.4

2007

5.6

2007

6.9

2023

5.6

2024

8.0

2018

9.5

1979

6.3

2010

8.1