2014

7.8

2004

5.7

2007

7.6

2012

7.7

2002

6.1

1998

5.4

2007

7.7

2020

7.2

2006

7.8

2020

7.0

2005

5.2

2010

8.0

1996

5.9

2009

7.5

2009

7.9

2008

7.4

2016

6.8

2007

5.4

2017

8.0

1994

6.3