2006

5.6

1999

6.9

1983

7.3

2007

6.4

2003

5.7

1993

4.5

2004

6.1

1984

7.4

1996

6.1

2005

6.2

2004

6.8

2008

6.1

2006

6.5

2004

6.4

1999

6.4

1995

6.3

2006

6.4

1986

7.6

2004

6.7

2007

6.6