1957

8.5

1941

8.0

1939

0.0

1968

7.3

1970

7.2

1984

7.2

1967

7.5

1997

8.2

1993

6.3

1966

7.4

1983

5.9

1958

7.6

2006

6.1

1979

7.3

2001

6.5

2005

7.7

2006

6.7

1993

7.9

2003

4.0

2002

7.4