1957

7.0

2021

6.0

1997

7.9

2010

8.2

1968

8.1

2014

7.7

1988

6.2

2008

7.3

2010

7.8

1980

7.3

2003

7.1

2013

6.9

2007

7.2

2011

7.5

2000

5.5

2004

7.2

2010

7.5

1957

8.5

1994

7.0

2008

6.8