The living space is 4.5 square metres per person.[30] Mumbai Metropolitan Region was home to 20,748,395 people by 2011.[31] Greater Mumbai, the area under the administration of the MCGM, has a literacy rate of 94.7%, higher than the national average of 86.7%. The number of slum-dwellers in the Mumbai Metropolitan Region is estimated to be 9 million, up from 6 million in 2001 which constitutes approximately 41.8% of the region.[32][33]