1947

6.7

2016

6.0

1984

6.5

1938

5.5

1954

7.9

1990

8.5

2007

6.5

1965

7.4

1968

6.5

2014

5.4

1971

6.8

2012

4.3

2011

8.0

2005

7.0

2006

8.2

1992

6.8

2005

6.2

1979

7.3

1993

6.3

1991

6.7