2007

3.4

1990

5.2

1977

5.7

2002

6.1

1982

6.4

2009

6.4

1999

6.7

1980

3.5

1994

7.6

1998

6.0

2005

6.6

2001

0.0

1977

0.0

1984

8.0

1984

3.7

1982

6.0

2001

3.8

2002

7.9

1997

6.1

2001

6.5

2001

5.8

1957

6.3

1980

5.7

1994

7.2

1994

6.3

1984

0.0

2004

5.0

1995

4.8

1988

5.3

1988

5.8

1985

7.3

1992

6.8

2002

6.0

1988

6.2

1983

0.0