2009

5.3

1980

4.3

1981

7.3

1985

5.7

2007

5.4

1999

4.7

2006

4.9

2011

6.4

2018

5.0

2014

5.5

2015

9.0

2003

6.0

2007

8.2

2003

8.4

1994

5.1