1946

6.6

1971

6.8

1974

7.9

2014

6.8

1995

6.0

2001

6.9

2007

7.3

1976

7.2

1993

0.0

2006

6.0

1998

7.1

1984

5.5

1998

6.3

1977

6.8

2006

5.4

1981

7.4

2000

5.7

1981

6.5

1998

6.5

2007

7.6