1999

5.8

1981

5.2

2015

10.0

2005

5.5

2008

4.5

1986

6.7

2013

6.3

2016

6.1

2004

6.5

2007

6.1

1986

6.5

2007

5.8

2004

6.2

2002

5.2

2017

6.5

2002

4.8

1995

6.6

2014

6.0

2001

6.4

2014

5.1