We have variance of ~20% on the daily run, every yearly estimation can only be completely wrong and useless, IMHO.
lol no shit its hard to calulate monthy profits and u are trying to project for a year?
you know what difficulty and price fluxtuations are?
heck week to week there is varince let alone yearly lol
best thing you do is lookat your expenses and costs to mine, power, parts gear etc
and project how much you need to make to ROI its useless to using a mining calculator to project
mining earings correctly, I guess you can take daily predictions and multiply by 365 but I will most
definitely be wrong