During that year membership doubled to 3,000, reaching 4,000 by 1939.

Today it is a quickly growing confession, with membership having doubled from 1991 to 2001.

By 1911 the organisations' membership had doubled to nearly 14,000 workers.

By 2007, membership had doubled and the average age halved.

And in the last two years, Schooner's membership has more than doubled.

Attendance increased more than 10 percent to 33,000 in 1991 and membership doubled to 3,500.

By 1799 the Society had assets of £4m and its 5,000 membership subsequently doubled to 10,000 in 1810.

Its membership has doubled to 25,000 people in all 50 states and 30 foreign countries.

(In less than four years, the church's membership would eventually double to over 8,000 members).

In the last three years, membership has doubled to more than 500.