2012

6.4

1993

4.9

2017

6.9

2012

5.8

2012

6.7

2008

7.0

1991

5.9

2010

6.8

2011

7.2

2009

5.6

2004

6.5

2014

5.6

2009

6.7

1972

6.4

2016

7.2

2010

6.3

2019

8.1

2001

4.7

2013

6.1

1998

5.2