1991

6.8

2006

4.7

2014

5.4

2009

5.3

2002

6.5

2014

0.0

1908

5.5

2010

5.2

2004

2.0

2001

5.3

2014

9.0

2013

6.5

2014

4.0

1937

7.3

2011

5.6

2006

7.0

2018

6.0

2005

6.8

2015

6.7

2012

7.1