2006

7.7

1995

7.2

1986

8.0

2002

7.5

1977

0.0

0.0

2007

6.0

1992

0.0

2013

7.5

2005

7.8

1996

8.5

1994

8.2

2005

7.3

1990

7.0

1997

6.7

2012

7.8

2004

8.2

2000

6.9

2002

5.2

1987

6.6