2015

7.3

2002

7.0

2002

6.1

2012

6.0

1987

8.0

2005

7.2

2013

7.5

2008

6.8

2017

7.2

2008

7.4

2001

6.9

2013

6.9

1984

7.1

1994

4.6

2015

6.1

2018

6.4

2016

5.2

2015

6.2

2014

7.0

2017

6.6