I will probably ask my colleague Mireille Laroche to chip in on that, if she can, because frankly I don't have a great explanation for blank fields. In my seven months I haven't really uncovered that. The one thing I do know is that there were difficulties with the data entry in some cases. I think you mentioned things that happened before the file was received or after it was done, blanks were there. We do have a data integrity program that we put in place to try to catch those.
On March 20th, 2017. See this statement in context.