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

When TRICS® 2010(a)v6.5.1 was issued in December 2009, 301 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 December 2009.