2004

8.3

2014

8.1

2018

9.6

1996

5.3

2006

8.6

2001

6.7

1998

8.6

1993

7.9

2008

7.6

2010

8.0

2007

7.3

2016

7.8

2003

7.8

2004

8.6

5.8

2003

8.2

2015

6.7

1993

6.6

2003

5.5

1977

7.2