2005

0.0

1971

7.6

2005

7.2

3.3

2006

7.0

1986

5.5

1970

7.7

1977

6.9

2003

7.6

1998

6.9

2002

6.7

2000

5.8

2002

6.0

1991

7.7

1992

7.1

2004

5.7

2002

7.2

1979

6.7

1994

8.3

2004

6.2