2004

6.6

2004

6.7

2002

4.8

2003

5.0

2002

6.2

2007

5.7

2002

3.9

2001

6.6

2002

5.3

2002

6.3

2003

6.8

2000

6.2

1978

7.0

1998

6.1

2004

7.3

2005

5.7

1983

6.0

2011

7.0

2005

4.3

2007

4.5