2017

6.1

2016

6.7

1994

6.2

2006

5.5

2012

7.8

2020

6.9

2004

6.6

2010

7.0

2011

7.1

2019

6.5

2004

7.3

2007

6.3

2014

6.3

2003

7.8

1992

6.2

2008

6.5

1991

6.2

2012

6.5

2003

6.3

2008

6.8