0.0

7.0

1981

6.1

1999

5.0

1989

8.2

1987

6.3

2006

8.8

0.0

2008

5.0

2013

6.1

5.3

1971

7.8

1967

9.0

4.9

2003

9.2

10.0

2014

9.7

0.0

8.0

2006

0.0