1977

3.8

1970

5.5

1970

5.0

1974

5.5

2013

5.2

1982

4.9

1973

6.0

2019

6.4

1977

5.3

2004

3.0

1979

4.0

2006

7.0

1975

4.9

1996

2.7

1972

3.2

1980

0.0

1991

4.6

2000

3.6

1970

4.1

2017

7.0