You are serious, right? Facts. From Frontier? Like the raw data?
Yeah, I definitely would NOT hold my breath on that one.
FDEV is assuming a position of neutrality because they don't want to alienate a particular player base... be it PvE or PvP. If you think about it, it's a rather smart business decision to keep people speculating, so they can keep raking in the money.
Now, I would assume by comparison of other games that offer dedicated PvE vs PvP environments (servers, for example) the population of which PvE far exceeds those of a dedicated PvP server... which should in and of itself tell you where the majority of interest lies when it comes to gaming in general (doesn't matter which genre). Based on that assumption, I can make an educated guess that there are more PvE'ers than PvP'ers.
I don't expect any company to be transparent with said information if it's going to affect their bottom line in any way- after all, even 20% either way would be huge loss of potential income.