2009

6.1

1996

6.7

1988

5.3

1982

6.2

2018

7.5

2001

6.1

2005

5.1

2003

5.8

2012

6.0

2007

6.2

2009

4.8

1998

6.0

2017

6.0

2016

5.9

2010

5.2

2000

5.1

2017

5.6

2017

7.0

2014

5.4

2018

6.2