1979

6.0

1994

4.4

1983

4.7

1990

4.5

1992

6.0

2005

5.8

1977

5.3

1973

6.2

2018

6.8

1983

4.3

1981

5.8

1972

6.4

1985

7.2

1982

5.9

1982

5.2

2016

6.1

1976

4.2

1980

5.1

2007

0.0

1982

4.7