2002

7.4

2012

8.0

2014

6.2

2016

6.6

2014

6.6

2016

6.0

2012

7.7

2005

6.3

2000

6.4

1968

7.1

2013

6.9

1996

6.2

2016

7.7

2014

7.5

2017

8.5

2015

5.7

2011

6.3

2007

6.7

1995

7.9

2014

5.9