1995

8.7

2005

4.6

2006

5.7

2013

5.9

2009

6.3

2005

6.0

2008

3.3

2008

6.5

2003

7.2

2006

3.8

2023

8.0

1979

0.0

2007

6.9

2009

6.6

2016

6.4

1989

6.3

1986

6.5

2018

7.4

2018

6.2

2023

5.6