Muslim population growth is the population growth of Muslims worldwide. Between 2015 and 2060, Muslim population is projected to increase by 70%. This compares with the 32% growth of world population during the same period. The young median age and high fertility rate of Muslims relative to other religious groups are significant factors behind Islam's population growth. As of 2015, Muslims have the highest fertility rate of any religious group – an average of 2.9 children per woman, well above replacement level (2.1) —well above the global rate—but down from 4.3 in 1990–1995. According to a study published in 2011 by Pew Research, whilst there is a lack of reliable data, religious conversion might have no net impact on the Muslim population as the number of people who convert to Islam is thought to be similar to those who leave Islam. According to another study published in 2015 by the Pew Research Center, Islam is expected to gain a net of 3 million adherents through religious conversion between 2010 and 2050, which makes Islam the second largest religion in terms of net gains through religious conversion after religiously unaffiliated, mostly comes from Sub-Saharan Africa (2.9 million). Islam by country The six fastest-growing religions in the world are estimated to be Islam (1.84%), the Baháʼí Faith (1.70%), Sikhism (1.62%), Jainism (1.57%), Hinduism (1.52%), and Christianity (1.38%), with high birth rates being cited as the major reason. Islam is currently the largest religion in Asia. According to the Pew Research Center, 27.3% of the people living in the Asia-Pacific region in 2030 will be Muslim, up from about a quarter in 2010 (24.8%) and 21.6% in 1990. Islam is the fastest-growing religion in India. Growth rate of Muslims has been consistently higher than the growth rate of Hindus, ever since the census data of independent India has been available. For example, during the 1991–2001 decade, Muslim growth rate was 29.5% (vs 19.9% for Hindus). However, Muslims population growth rate declined to 24.