5.6

2016

6.7

1986

6.4

2011

8.0

1949

6.9

2008

7.8

2002

6.0

1946

7.7

1974

7.5

2009

6.6

2013

7.0

2009

5.0

1991

6.8

2011

5.5

2012

6.4

1995

8.2

1971

7.4

1998

8.6

2011

5.7

1960

8.3