Article History
Received: 7 March 2018
Accepted: 23 April 2018
First Online: 21 May 2018
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: This article does not contain any studies with human or animal subjects performed by the author.
: The study used the data set that is available online in the public domain; hence, there was no need to seek ethical consent to publish this study.
: The authors confirm that all data underlying the findings are fully available without restriction. Data are publicly available from the Demographic and Health Survey website:ExternalRef removed.