"The rise of AIUDF is directly linked to the issue of changing character of demographic change in the state. The 2011 census is very important in this regard. As per the census of 2011, total Hindu population stands at 61.47% and Muslim population at 34.22%. At the rural areas Hindus comprise 58.57% and Muslims comprise 36.85%. In 1971, Muslims in Assam comprised of 24.6%. Facts reveal that in 1971 only Dhubri and Hailakandi districts were Muslim majority; in 1991 four districts have turned out to be Muslim dominated—Dhubri, Hailakandi, Goalpara and Barpeta. In 2001 six districts have become Muslim dominated; and in 2011 nine districts have become Muslim dominated. … In these districts there are dominance of East Bengal origin Muslims. Immigration of Muslim to Assam mainly started in order to meet the British colonial economic inter- est. On the eve of partition and even in post partition days, the process of immigration more or less continued. The immigration process height- ened during Bangladesh liberation war. The issue of unnatural growth of Muslim population in the state was linked to the issue of Immigration of Bangladeshi Muslims to Assam."