2013

7.6

7.8

1993

6.1

2015

7.4

2003

6.9

6.4

2017

7.0

2013

7.3

1988

5.5

1961

6.9

2006

4.1

2017

6.7

2016

6.2

2005

7.7

2014

6.6

2015

5.9

2013

7.2

2014

4.7

1967

7.7

2014

7.9