1983

6.0

1988

6.7

2011

6.8

2006

7.6

1999

7.1

1996

8.1

1987

6.9

1974

7.1

1991

7.8

1999

8.2

2009

6.4

2017

7.5

2013

6.8

2014

6.5

2024

0.0

2006

8.5

1992

5.7

2018

7.3

1971

8.6

2024

10.0