2009

6.6

1951

6.4

2004

7.1

1988

6.3

1966

6.6

2004

6.7

1972

8.7

1985

6.9

1990

6.3

1952

6.7

1968

6.0

1976

7.1

1974

6.5

1994

7.5

1949

6.9

1977

7.3

1975

7.9

1958

6.2

2008

6.7

1941

6.0