1981

7.1

2015

8.7

1997

7.2

1977

6.8

1998

6.6

1982

5.0

1979

6.7

1966

7.6

1979

6.1

2016

7.5

1963

7.2

2014

6.6

1978

0.0

2014

6.1

1981

4.4