2011

7.3

2010

6.3

1981

6.2

1992

8.0

2005

7.6

1983

8.2

1999

8.4

2016

7.4

2014

7.9

2020

7.2

2013

5.8

2015

7.5

2015

7.6

2019

8.1

2014

7.9

2013

7.8

2017

7.6

2013

6.3

2001

8.4

2003

6.3