Some of these estimates rely in part on demographic losses. Conquest explained how he arrived at his estimate: "I suggest about eleven million by the beginning of 1937, and about three million over the period 1937–38, making fourteen million. The eleven-odd million is readily deduced from the undisputed population deficit shown in the suppressed census of January 1937, of fifteen to sixteen million, by making reasonable assumptions about how this was divided between birth deficit and deaths."[68]