2000

8.0

2006

8.6

2012

8.1

1982

7.5

2010

8.1

2008

7.9

2005

7.5

2011

8.1

2005

7.7

2017

7.6

2016

7.6

2006

7.8

2016

7.1

2007

7.7

2007

8.0

1989

7.9

2008

7.7

1995

8.1

2015

7.3

2010

7.4