1997

6.6

2011

8.1

2015

6.6

2004

7.9

2006

7.1

2004

7.9

2017

3.5

2020

7.7

1994

8.4

2005

8.2

2006

7.5

2014

7.8

2003

7.6

2009

7.5

2002

7.4

2003

6.2

2018

7.0

1995

6.5

1998

7.1

2018

8.5

2004

7.8

1998

6.8

2002

7.3