Globally, The World Christian Database as of 2007 estimated the growth rate of Christianity at 1.38%. High birth rates and conversions in the Southern Hemisphere were cited as the main reasons for the increase.
Pentecostalism, described by the Pew Forum on Religion and Public Life as a group of charismatic movements, has grown, according to researchers, from 72 million in 1995 to 525
million in 2000, though some have criticized these numbers as defining
Pentecostalism too broadly. According to a 2005 paper submitted to a meeting of the American Political Science Association, most of this growth has occurred in non-Western countries and concludes the movement is the fastest growing religion worldwide.
In Vietnam, the US Department of State estimates that Protestants in Vietnam may have grown 600% over the last decade in Vietnam. In Nigeria, the numbers of Christians has grown from 21.4% in 1953 to 48.2% in 2003. In South Africa, Pentecostalism has grown from 0.2% in 1951 to 7.6% in 2001. In South Korea, Christianity has grown from 20.7% in 1985 to 29.2% in 2005 according to the Pew Forum.
The 2001 American Religious Identification Survey (ARIS) survey, which involved 50,000 participants, reported that the
number of participants in the survey identifying themselves as deists
grew at the rate of 717 percent between 1990 and 2001. If this were
generalized to the US population as a whole, it would make deism the
fastest-growing religious classification in the US for that period, with
the reported total of 49,000 self-identified adherents representing
about 0.02% of the US population at the time.
|“||Islam is already the fastest-growing religion in Europe. Driven by immigration and high
birthrates, the number of Muslims on the continent has tripled in the
last 30 years. Most demographers forecast a similar or even higher rate
of growth in the coming decades.