How many moai statues have been documented on Easter Island, per the Easter Island Statue Project's inventory?

Answer

887 statues

Nearly half the moai never left the quarry at Rano Raraku, including 'El Gigante,' an unfinished colossus about 21 meters tall — almost twice the height of any moai ever erected. The famous 'heads' actually have full buried bodies.

Source: Easter Island Statue Project (EISP)