2002

6.2

1978

6.0

2006

6.3

2008

5.0

2020

6.7

2006

5.5

1998

7.3

2010

5.5

2005

5.9

2013

5.9

2017

3.3

1992

7.0

1978

7.5

1995

7.7

2007

6.6

2008

5.6

2008

4.4

2014

5.4

2008

5.8

2009

3.8