1973

6.9

1985

6.5

1958

7.8

1996

6.6

2012

4.8

1929

7.4

1946

7.2

1983

5.8

1944

6.7

1989

5.1

1994

4.4

2016

7.5

1999

7.6

1999

7.1

1985

7.4

2007

7.0

1996

6.0

1992

5.8

1970

7.3

1939

6.1