2011

5.9

2011

5.2

2010

5.8

2002

6.9

1981

6.5

1965

6.7

2007

7.7

2013

8.1

1992

7.3

2004

6.4

1989

6.4

1995

6.2

1997

6.4

1967

6.6

1997

6.6

1954

7.2

2006

7.0

2007

6.0

2010

5.9

2010

7.0