1975

7.0

1978

7.5

1981

6.3

1953

6.2

1973

7.0

1954

5.5

1980

5.0

1993

5.5

1998

7.0

1965

6.1

1984

6.6

1975

7.0

1997

7.3

1977

5.8

1996

5.7

1990

6.9

2005

8.2

1986

5.7

1984

7.0

1993

8.2