2015

6.0

2006

7.0

2014

4.6

2016

6.5

2017

6.7

2014

8.4

2011

6.5

2006

4.1

1971

6.8

1991

7.0

2015

6.4

2003

4.9

1969

5.1

1982

5.4

2010

7.7

2011

7.8

2019

4.8

1994

7.4

2012

9.4

2011

6.9