2010

6.6

2004

9.9

1955

7.2

1953

7.3

1950

6.8

1952

7.7

1979

6.2

1986

6.6

1983

6.1

1967

6.7

1966

6.1

1966

6.8

1939

6.7

1994

5.9

1977

7.4

1990

6.1

1965

7.5

1994

7.5

1987

5.3

1999

7.4