1976

0.0

2005

4.5

2000

5.0

1993

3.0

1992

5.6

1984

6.9

1979

6.0

1999

7.6

1967

6.1

1984

0.0

1971

6.4

1999

3.0

1970

6.2

1980

7.0

1992

0.0