2005

7.8

2021

8.3

2016

6.5

5.6

1998

8.8

2010

7.1

2012

7.3

2002

7.7

2011

6.2

1989

5.9

2017

7.3

2010

7.7

2012

7.0

2016

6.9

2018

7.6

2007

7.7

2012

6.2

2007

5.4

2014

6.5