NEW GROUPS RATIO — 1:5
Factoid: Of the groups that now exist in a church, one of every five should have been started in the past two years.
Source: (Win Arn, ‘How to Use Ratios to Effect Church Growth’, in Wagner, C. Peter, ed. Church Growth: State of the Art. Wheaton, IL: Tyndale, 1986, ch. 8, p. 99.)