1988

6.6

1961

6.2

1947

6.0

1998

6.9

2007

6.8

2003

7.2

2017

6.7

1985

0.0

1984

0.0

2003

7.1

1978

6.3

1995

6.5

1998

5.7

1946

6.5

1977

7.0

1961

5.9

1983

7.2

1925

5.9

2005

2.0

1984

7.2