This next bit of research was from an article in March 2018, but I completed the research in June 2018. It is about the gender pay gap stating that its 16%. I looked to see if it was 16%, and if it was for all countries, and any profession.
I’ve created a video that is basically an easier way to look at this article. The details and links are the same as this written version, but a lot of people find watching easier to understand than the reading 
Also, underneath are the links to the actual article, so that you can read at your leisure etc. They’re in word, pdf and word (zipped) versions.