1975

6.4

1970

3.0

1971

0.0

1973

0.0

1971

5.0

1976

6.0

1972

0.0

1968

0.0

1971

0.0

1968

0.0

1976

0.0

1975

0.0

1969

0.0

1975

0.0

1970

6.7

1975

6.9

2005

7.3

1998

7.4

1970

0.0

1970

0.0