1993

6.4

1985

5.6

2004

7.3

2014

8.4

2017

6.0

2008

6.4

1929

5.9

2016

6.5

2004

6.2

2006

6.5

1945

8.1

2017

6.5

1968

5.6

1994

6.0

1968

6.0

2017

6.8

1999

6.5

1988

6.1

1968

4.4

1950

8.1