1985

6.7

2006

6.3

1991

6.0

2012

9.7

1993

9.2

2012

0.0

2010

9.1

2016

5.0

2020

8.0

1978

4.2

1987

3.5

6.0

2003

4.0

2015

5.5

2011

6.1

1965

10.0