Membership of TRICS® has grown steadily from the system's first version in 1989 up to the current day.

When TRICS® 2011(b)v6.8.1 was issued in June 2011, 292 organisations were operating TRICS® licences. Click here to view members by organisation type

TRICS® licences are held by a variety of organisations, including local government, consultancies, and educational establishments. The graph here shows the total number of membership organisations operating licences as at March 2011.