2018

5.0

2007

7.7

2005

6.7

2008

7.4

1967

4.2

2015

6.2

1989

5.9

2000

5.5

2012

6.2

2010

6.4

2016

7.2

2009

6.9

2006

6.4

2009

6.7

1975

4.9

2007

6.5

6.8

2011

7.5

2015

6.4

2019

5.5