1990

0.0

1984

7.0

1996

5.6

2004

4.0

1997

5.8

1978

8.8

1972

0.0

1960

7.1

1999

2.0

1995

5.3

1970

0.0

1972

0.0

1979

0.0

1989

0.0

1999

4.2