1999

7.5

2016

8.6

2013

8.0

2012

6.4

1998

7.1

2014

6.4

2001

7.8

2019

7.4

1996

8.1

2014

7.3

2008

8.9

2018

7.5

2015

9.6

1985

7.9

2009

7.7

2019

6.1

2000

6.8

2017

7.5

2004

7.1

2018

7.3