1979

5.0

1962

6.5

1997

6.6

1999

6.3

2002

6.0

2005

6.1

1996

7.0

2000

6.1

2006

6.7

1926

7.9

1942

6.0

2001

6.9

1974

7.5

1962

7.0

1963

7.1

1965

6.7

1977

6.8

1997

6.4

1979

4.0

1959

8.0