2016

6.6

2004

6.0

1995

7.2

2002

6.5

2014

7.0

1991

6.2

2010

5.5

2012

5.3

1988

6.4

2015

6.8

2012

4.5

1988

7.6

2006

6.1

2003

6.7

1994

6.2

1996

6.1

2017

5.8

2003

5.7

2017

6.7

2008

6.3