1994

7.7

2014

7.3

2011

8.2

2018

5.7

2004

7.9

2020

8.7

2004

8.0

2019

7.6

2015

6.6

2016

7.3

1998

7.5

1984

7.8

2011

9.3

2016

9.2

2014

6.1

2012

6.8

2005

7.1

2002

10.0

2003

7.7

2016

6.2