1986

6.9

1979

8.0

1974

0.0

1970

4.0

1974

0.0

1982

7.0

1972

0.0

1971

5.6

1978

0.0

1990

0.0

1969

0.0

1973

4.0

1976

0.0

1979

5.2

1989

0.0

1973

0.0

1977

6.0

2003

7.4

2008

8.5