2012

7.3

2014

4.4

2015

8.1

2012

9.3

2016

6.8

2010

6.2

2006

7.0

2005

7.8

2001

6.9

2003

6.5

1979

7.6

2011

7.2

2018

8.0

2003

6.2

2014

6.5

2001

8.9

1969

6.8

2010

7.8

1985

5.3

2015

7.3