2000

8.0

2018

7.4

2015

7.8

2016

7.3

2019

8.7

2004

7.4

2004

7.9

2013

7.5

2014

8.3

2016

7.0

2011

7.6

2012

6.8

1963

7.9

1993

7.9

2013

6.9

2001

7.8

2015

7.1

2017

5.9

2002

8.6

2016

7.2