2016

9.0

2011

7.4

2007

7.1

1992

6.9

1981

7.6

2002

7.3

2016

7.2

2015

7.0

2011

8.4

2013

8.0

1988

7.7

2017

8.6

2001

7.8

2016

6.9

2009

7.9

2021

7.4

2017

8.0

2011

7.0

1996

8.1

2006

6.3