Numbers, Facts and Trends Shaping Your World

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  • report

    Chapter 1: Main Factors Driving Population Growth

    When demographers attempt to forecast changes in the size of a population, they typically focus on four main factors: fertility rates, mortality rates (life expectancy), the initial age profile of the population (whether it is relatively old or relatively young to begin with) and migration. In the case of religious groups, a fifth factor is […]

  • report

    Table: Percentage of Congressmen by Religious Affiliation

    Display: Number | Percentage Religion 87th 91st 96th 101st 106th 111th 112th 113th 114th Net change (’61-’62) (’69-’71) (’79-’80) (’89-’90) (’99-’00) (’09-’10) (’11-’12) (’13-’14) (’15-’16) 87th-114th Protestant 74.8% 70.9% 63.7% 60.7% 59.0% 55.1% 57.4% 56.1% 57.2% -17.6% Baptist 11.7% 9.9% 10.3% 10.3% 13.1% 12.4% 12.7% 13.7% 14.8% +3.1% Methodist 18.2% 16.5% 14.6% 14.6% 12.0% 10.7% […]

  • report

    History of Clergy in Congress

    Seven ordained ministers hold seats in the new Congress – one more than the number in the very first U.S. Congress (1789-1791).[1. Figures for the number of clergy serving in the first Congress come from the National Constitution Center in Philadelphia.] But because Congress was a much smaller body in the late 18th century than […]

  • short reads

    The divide over ordaining women

    Only 11% of American congregations were led by women in 2012, according to press reports of an upcoming National Congregations Study survey. That figure hasn’t changed since 1998.

  • report

    Chapter 4: Pentecostalism

    For more recent survey data about religion in Latin America, read our 2026 report “Catholicism Has Declined in Latin America Over the Past Decade.” Many Christians in Latin America identify with Pentecostalism and related movements. Pentecostals take their name from the biblical feast of Pentecost (originally the Jewish festival of Shavuot, which took place 50 days after Passover), when […]

  • report

    Part 1: Experiencing Online Harassment

    Forty percent of adult internet users[2. numoffset=”2″ Some 89% of American adults are now internet users.] have personally experienced some variety of online harassment. In this study, online harassment was defined as having had at least one of six incidents personally occur: 27% of internet users have been called offensive names 22% have had someone […]