1987

6.3

1978

6.6

1997

8.3

2004

6.5

1998

8.3

2016

7.6

1990

6.6

1986

7.4

2001

7.0

2004

4.5

2014

6.8

2004

6.9

2001

7.5

1981

6.5

1978

7.2

1954

7.0

2013

5.7

2001

0.0

1959

5.6

2016

8.4