2007

3.5

1970

4.5

1999

3.6

1991

0.0

1999

4.9

2003

5.8

1997

0.0

1957

7.1

2000

5.4

1984

6.2

1971

0.0

2001

0.0

1990

6.9

1955

0.0

1975

5.2