2006

6.4

1987

6.9

2011

6.8

1997

1.0

1994

7.6

1997

6.7

1995

4.5

1984

7.5

1988

0.0

2003

8.2

1984

6.3

2016

6.0

1987

3.2

1980

5.8

1988

6.2

1989

5.4

2004

9.0

1988

6.2

2013

6.7