PQD column on account mileage posting statement

Excuse me if this has been posted elsewhere, but was just checking my account to see if some flights I took earlier this week had posted. Indeed, some had but for the first time I noticed that in addition to a column for PQMs and PQSs there was a column for PQDs. As a non-US-based elite, the spend was never an issue and I don't recall ever seeing this column or breakdown of my tickets/flights before. Has this just been added recently, or has it been there since this became a criteria for elite status and have I just not noticed it? (Normally the PQD amount never displays on the home page account summary either for those of us based outside the US.) The first time I ever saw my actual spend number was when the graphic elite tracking display started up late last year.