2020

4.8

2009

7.7

1999

7.0

2015

7.6

1996

7.3

1992

7.2

2002

7.9

2019

7.8

2017

8.1

2005

7.3

1998

8.5

2014

8.5

2016

8.5

7.2

2013

7.8

2017

7.9

2001

7.0

2017

7.8

2016

7.5

2004

7.7