1981

7.0

2010

3.7

2023

8.1

1996

5.9

1985

6.7

1997

6.6

2004

6.4

1967

7.3

2006

6.6

2012

8.2

2008

8.5

1968

8.1

2017

7.6

2014

8.4

1978

7.4

2003

8.5

2014

8.0

2007

7.9

1997

7.9

2015

5.9