2006

4.2

1994

8.0

2009

4.9

2015

7.9

2005

6.1

1995

6.3

2011

4.8

2014

7.8

1997

1.0

1998

7.0

2003

6.4

2002

7.9

2010

8.0

2017

8.1

2021

8.3

2020

5.0