2006

10.0

1984

7.0

1988

6.4

2008

9.0

1996

5.3

0.0

2013

5.8

1980

5.1

1986

6.7

2009

5.9

2010

4.8

1980

5.3

2002

5.4

2010

7.1

1994

5.7

1977

6.3

1996

6.2

6.1

1948

7.2

2010

7.7