1993

3.3

2000

4.0

2015

0.0

1989

3.4

1995

3.5

1999

5.0

2014

7.9

2007

5.0

2009

7.0

1988

0.0

2005

5.1

2011

4.4

1998

9.0

2004

4.2

2012

5.1