2013

6.5

2000

6.4

2006

5.5

2003

6.7

2004

6.5

1986

7.4

2004

4.5

2001

5.6

2001

5.1

2002

6.0

2001

7.7

2007

6.5

1983

7.5

2006

6.1

2007

6.1

1992

5.6

1985

6.6

1996

5.9

2003

7.4

2004

6.9