2004

7.3

1981

6.5

1992

6.2

1993

6.2

2014

7.2

2011

9.0

2010

6.1

2012

7.2

5.8

2010

4.4

2014

8.5

2008

7.7

2015

7.0

2023

10.0

9.5

2006

6.7

1993

5.6