2017

8.2

2009

9.7

2014

9.0

2011

7.0

1968

8.0

2002

10.0

1983

7.3

2003

7.1

1982

7.8

1999

5.5

1999

6.0

2006

5.0

1992

6.7

1993

6.1

2002

5.9

1987

6.8

2001

5.9

2002

6.4

2008

4.9

2014

0.0