2008

0.0

1990

6.7

2006

6.3

1997

6.8

1982

1.7

1965

6.3

2007

6.7

1994

3.2

1979

5.3

2001

6.2

1973

3.2

2004

5.5

1997

6.5

1961

4.6

1972

6.2

1975

5.7

1995

6.5

1980

6.4

1989

4.6

1990

3.8