1981

0.0

1995

6.6

1982

7.6

2001

5.7

2014

10.0

1978

6.8

2001

5.6

1977

6.0

1996

6.7

1976

7.5

1999

7.3

1995

7.6

1993

7.9

1987

8.4

1995

7.8

1978

7.5