1970

6.4

1990

0.0

1990

0.0

1971

5.3

1985

2.8

1980

9.0

1992

4.4

1992

1.0

1991

3.5

1990

6.8

1987

6.5

1984

4.9

1996

4.2

1994

4.0

1995

4.7

1988

6.5