1966

6.1

1988

5.5

1993

6.5

2017

6.6

1973

7.3

1957

8.1

1988

6.5

1996

6.5

1965

7.2

1974

6.5

1983

7.9

1993

6.1

1933

7.6

1965

6.4

1985

6.4

1963

6.9

1993

7.2

1975

6.8

1990

6.8

2002

6.5