1984

8.3

1999

2.0

2011

9.5

2016

10.0

2009

5.7

2014

5.2

2017

7.8

1978

0.0

2016

7.0

1997

8.0

2006

7.2

2003

6.8

1961

5.6

1998

7.8

2017

6.2

2016

6.2

1979

0.0

1941

5.0

2017

3.8

2000

4.1