2013

6.6

2017

6.0

2009

7.2

1987

5.5

2022

5.6

1978

6.5

2010

5.5

2015

5.1

2008

6.1

2013

6.7

2010

7.3

1975

8.4

2007

6.9

2003

7.1

2009

6.6

2001

6.4

2014

5.6

2016

6.5

2013

6.9