1997

4.8

1995

6.0

1984

6.5

2004

6.4

2000

6.3

2010

6.8

2016

7.0

2014

4.9

2006

6.3

2009

6.1

1988

6.0

1992

6.2

2024

6.8

2009

6.0

2013

6.9

2001

5.0

1985

6.7

2013

3.6

2009

0.0