We present the result of 6yr monitoring of SgrA*, radio source associated with the supermassive black hole at the centre of the Milky Way. Single dish observations were performed with the Itapetinga radio telescope at 7mm, and the contribution of the SgrA Complex that surrounds SgrA* was subtracted and used as instantaneous calibrator. The observations were alternated every 10-min with those of the HII region SrgB2, which was also used as a calibrator. The reliability of the detections was tested comparing them with simultaneous observations using interferometric techniques. During the observing period we detected a continuous increase in the SgrA* flux density starting in 2008, as well as variability in time-scales of days and strong intraday fluctuations.