1972

0.0

1969

0.0

1986

6.9

1979

8.0

1974

0.0

1970

4.0

1974

0.0

1976

0.0

1982

7.0

1972

0.0

1971

5.6

1978

0.0

1979

5.0

1989

0.0

1990

0.0

1973

0.0

1977

6.0

1996

6.6

2002

7.1

1995

7.4