2008

8.3

1997

6.8

1981

6.6

1998

5.4

2009

6.4

2005

7.0

2006

8.1

1985

7.2

2015

4.0

1991

5.0

2007

5.8

1985

7.0

2008

7.3

2009

6.5

2014

9.0

2023

0.0

2012

6.0

2020

7.5

1999

6.4

2011

8.5