2013

6.6

2010

7.8

2006

5.6

2003

4.5

2009

4.9

1990

7.4

2001

7.6

1999

7.9

2017

8.1

2020

5.2

2015

6.7

2002

5.9

2017

7.6

2006

5.5

2008

7.5