1979

5.9

1992

6.9

2016

10.0

2025

8.1

2011

7.4

1976

7.9

1987

7.8

2012

6.0

2004

7.8

2013

7.7

2022

7.5

2007

6.7

1998

7.2

1991

7.7

2011

6.1

2015

8.3

1951

7.9

1984

6.9

2015

6.4