2006

8.6

2023

10.0

2008

7.6

2007

7.1

1984

8.4

1999

7.9

2017

8.0

1982

7.5

2001

7.8

1998

7.1

2014

7.4

2011

8.4

2009

6.8

2010

7.7

2009

6.5

2008

7.6

2008

7.4

1977

7.6

1999

8.2

2016

8.0