1998

6.7

1995

6.8

2015

7.0

1957

8.0

1960

8.2

1997

7.4

1988

6.6

1966

0.0

2005

6.6

1947

6.5

2004

7.9

1959

8.1

1930

6.1

1964

7.1

2006

7.3

1957

10.0

1981

7.1

1965

7.7

1965

6.8

1946

6.7