1987

5.4

1993

7.4

1970

8.0

1970

0.0

1995

6.6

1969

0.0

1968

5.3

2008

6.9

2014

5.2

1981

6.8

2007

5.9

1973

7.0

2005

6.0

2012

8.3

1967

0.0

1967

0.0

1972

6.5

1977

6.3

2018

6.4

2016

3.6