2007

7.6

2014

6.3

1988

8.1

1990

6.9

1985

7.2

2017

7.3

1973

7.9

1976

4.2

1944

6.9

1993

7.2

2004

7.5

2003

7.9

2007

6.1

2016

10.0

2008

5.1

2006

7.0

1992

6.2

1962

3.5

1967

5.3

1952

7.3