2018

9.6

2009

7.5

2015

8.3

2019

7.2

2012

7.3

2002

7.2

1998

7.1

2014

8.4

2001

7.8

2012

7.7

1989

8.3

1999

7.0

2015

6.8

2013

7.7

2016

6.9

1990

7.4

1996

6.8

2016

8.5

1998

6.9

1982

7.6