2000

6.1

2003

5.8

2015

8.3

2006

5.8

2005

7.0

2012

7.6

2009

5.9

2007

5.0

1990

7.4

2001

7.6

1999

7.9

2017

6.0

2000

5.7

2011

8.1

2013

7.9

2013

7.6

2018

6.1

2009

7.6

2016

7.0

2004

5.2

2020

8.1