ADXL203 initial 0g drift not clear in datasheet

Hi,

From datasheet of ADXL203(accelerometer) there is ±25mg drift when in steady state. As I understood if g=2.5v ,then 25mg is 62.5mv is it right?Then in steady state,when acc is flat,then we have almost 19.4 units of ADC,that means 3.3units for 1degree=>6degrees drift?