2006

7.9

2014

6.4

2013

8.6

2005

7.1

2009

6.1

2007

7.4

2005

5.6

1990

7.1

2008

6.0

2013

7.7

2017

6.0

2019

7.4

2003

7.8

2009

7.0

1999

10.0

1974

7.2

2016

6.9

2010

7.2

2007

7.5

2008

7.9