By Kent Fillinger AVERAGE SIZE Megachurches: 4,901 Emerging Megachurches: 1,375 Combined average weekly attendance: 386,035 GROWTH RATES Megachurches: 1.3 percent (down from 3.5 percent in 2014); overall, 54 percent of the megachurches grew (down from 68 percent in 2014). Emerging Megachurches: 2 percent (down from 5.4 percent in 2014); overall, 57 percent of emerging megachurches grew (down from 65 percent in 2014). Large churches: 4.1 percent (down from 4.9 percent in 2014). Medium churches: 3.3 percent (up from 3.1 percent in 2014). FASTEST-GROWING CHURCHES Worthington (OH) Christian Church, 35.1 percent New City Church, Phoenix, AZ, 33.3 percent New Day Christian