2008

7.3

2004

6.7

2003

4.7

2006

5.2

2001

6.2

2008

6.5

1975

4.9

2001

6.9

1996

6.7

2005

4.5

1995

5.8

1977

0.0

1991

6.8

1998

4.4

1997

5.2

1992

6.3

1998

6.3

2002

5.8

1996

7.1

2006

7.1