1998

7.9

2003

7.6

2012

8.2

2016

8.0

2016

7.1

2008

7.9

2010

8.2

2016

6.8

2011

7.2

2017

7.5

2015

8.4

2006

7.5

2006

7.6

2005

6.8

2016

7.4

2002

5.0

1955

7.7

1966

7.3

2019

7.6

2002

7.4