In which case, asking now really will give you next to no idea of how full the aircraft will be. As I say, it's all 9s at the moment, but I've been on plenty of flights that have been like that a month before the flight but went out pretty much at 100%.

Indeed, the flight might in theory even be overbooked already. But the number of reservations actually taken at any particular time will usually be hard to get as airlines regard it as confidential information.