1996

6.4

2019

5.7

2015

7.9

2005

8.3

2000

7.6

2002

7.7

2021

7.8

2023

6.0

2005

8.2

2004

8.6

2008

4.5

2003

7.6

2009

7.5

2011

7.6

2012

7.1

2014

2.0

2000

7.1

2015

7.3

2016

8.2

2003

6.0

2015

6.8

2007

5.0