1981

4.7

1984

10.0

1998

0.0

1989

0.0

1985

9.0

1997

5.5

2006

7.7

1993

0.0

1976

0.0

1990

5.4

1994

7.0

2002

6.0

1975

0.0

1996

0.0

1975

8.0

1980

6.0

1969

0.0

1969

0.0

1971

0.0

1987

0.0

1982

0.0

1983

0.0