1972

6.8

1998

7.2

2004

6.9

2003

7.2

2000

6.5

1996

6.8

1938

6.0

2005

6.1

1967

6.6

1953

7.4

1956

7.7

2000

6.4

2020

5.2

1939

7.6

1990

7.5

1998

6.1

1960

0.0

1985

7.5

1970

7.5

1996

6.5