1977

0.0

1989

6.8

2005

4.7

1982

7.0

1993

6.7

1997

4.5

1995

6.4

1993

6.9

2008

6.3

1983

3.9

2003

5.6

1991

7.2

1992

7.1

1993

6.4

1997

5.8

1997

6.5

0.0

1989

5.9

2016

0.5

1978

0.0