1999

7.6

2005

7.4

1945

8.1

1939

7.8

2004

6.8

2005

5.0

1981

6.4

1935

7.0

2017

7.6

1976

5.5

1987

6.0

2014

5.6

1996

5.8

1961

6.9

1981

5.7

1950

6.7

2016

5.7

1962

6.8

2000

6.4

2011

6.0