2005

6.5

1999

6.6

2001

4.8

2002

6.6

1998

6.6

2006

6.3

1975

7.3

2000

6.1

2006

7.6

2006

5.4

2005

6.2

1991

6.0

2017

6.0

1976

6.7

2005

6.5

2004

5.8

2004

7.2

2017

0.0

2007

6.7

1998

5.5