7.0

1981

6.1

1987

6.3

2008

5.0

1989

8.2

2013

6.0

1.0

0.0

1999

5.0

2006

8.8

1967

9.0

2003

9.2

4.9

10.0

5.3

2014

9.7

1971

7.8

0.0

0.0

8.0