2004

5.4

1978

5.0

2016

4.7

2015

5.7

2017

6.5

2020

6.3

2012

0.0

2015

6.8

2006

6.6

2007

4.4

2006

6.7

2016

4.9

2011

7.1

1981

6.0

1984

6.2

2006

5.4

2007

5.5

1977

5.5

1962

8.4

1999

5.8