1996

6.0

2005

6.2

2012

6.1

1928

7.3

2010

7.1

2010

6.7

1976

8.0

1999

6.8

1986

5.8

2006

5.8

2008

4.5

2016

5.1

1945

7.4

2007

6.9

1993

6.2

1968

6.7

2005

5.8

1979

4.7

2014

5.7