2009

5.2

1980

3.5

1981

7.3

1985

5.7

2007

5.5

1999

4.7

2006

4.8

2010

5.0

2011

6.4

2007

8.1

2018

5.0

2003

8.4

2014

5.5

2015

9.0

2003

5.9

1994

4.8