1967

6.1

1985

6.1

1998

6.5

1996

6.5

2013

6.7

1988

6.5

2006

6.0

1948

6.3

2004

9.9

6.8

2016

6.7

1944

5.6

2005

6.9

2015

6.1

2008

5.8

2004

6.4

2010

7.0

1993

6.5

2016

6.7

1994

6.6