1974

7.5

1985

6.7

1999

9.5

1967

6.7

2007

7.5

1969

7.0

1960

4.1

1986

5.5

1998

0.0

1984

6.5

1989

8.1

1984

8.1

2020

7.4

1987

4.2

1993

0.0

2013

6.8

2020

7.3

2002

7.9

1980

7.3

0.0