2006

6.1

1983

3.6

1996

1.0

2016

7.5

2012

6.4

1994

6.0

2000

0.0

1985

5.9

1997

6.2

1977

7.0

1999

4.0

1970

0.0

1980

0.0

1975

6.0

1978

6.5

1980

6.3

1976

5.8

1986

5.8

1996

6.4