2006

6.5

2009

7.3

2002

6.8

2004

6.6

1996

5.5

2006

8.2

1990

6.9

1994

7.8

1994

8.4

2005

8.2

2005

8.1

1991

7.8

1991

4.5

2006

10.0

2001

7.0

1990

7.9

1996

6.8

1995

6.4

1962

7.5

2003

7.4