2017

6.1

1994

8.7

1995

8.4

2012

7.4

1994

8.3

2014

8.4

2016

7.4

2009

7.6

2001

7.9

1999

8.4

2018

8.2

2016

8.2

2017

7.0

1979

8.2

2014

8.0

2010

8.2

1999

8.0

2007

8.1

1998

7.8

2014

6.5