After recording a staggering 47 per cent growth in population between 1991 and 2001, Delhi's decadal pace of population growth has slowed down to 21 per cent, with two of its nine districts, New Delhi and Central, registering even negative growth, the Census of India 2011 has revealed. It also shows how construction activity, displacement and rehabilitation of slums, and commercialisation of residential areas has led to significant demographic changes in Delhi.