7.5

1990

7.2

1957

7.9

1994

6.1

1985

7.2

1957

8.0

1948

7.4

2007

6.5

2011

6.9

1977

6.6

2014

5.4

1970

6.7

1928

7.6

1958

7.1

2013

5.3

1957

7.0

1939

7.2

1972

6.1

1925

7.3

1974

7.0