1984

6.0

1997

6.8

1984

6.3

1984

7.2

1989

6.0

1974

5.9

1956

6.5

2001

7.5

2004

7.0

1973

6.8

1994

4.5

1991

6.3

1986

7.0

1994

7.1

1991

6.3

1929

7.2

2003

6.2

1966

0.0

2006

6.8

1936

6.5