1967

0.0

1976

5.7

2001

6.3

1986

6.0

1954

6.5

2007

6.1

1957

7.0

2002

5.5

2005

6.3

1990

7.3

1991

6.9

2009

7.2

2008

5.7

1997

7.6

1963

6.6

2003

6.5

2004

6.7

1966

6.6

2009

6.3

2007

5.3