Does Pages 5.1 export Tracking Changes to Word

I am editing a document in Pages 5.1 and I am tracking changes. I need to send the documant as a Word document. When I used an earlier version of Pages last year I was able to Save As/Word file and keep the track changes information in the Word doc. Now with 5.1 it seems the tracking changes are not saved. At least it does not seem so. The file size of the Pages file is 217KB while the Word doc is only 11KB.