In the 1990s, the Austrian film industry underwent a number of structural changes. Some directors, both established and upcoming have created their own film-companies to share resources and learn from each other. The other film companies, the biggest of which are "Dor-Film" and "Allegro-Film", both producing at least two theatrically released films a year, concentrate on commercially oriented productions such as comedies with cabaret stars who enjoy a high profile in the Austrian market. Such comedies, notably Hinterholz 8 and Poppitz, both directed by Harald Sicheritz, have had the highest box-office of any Austrian films in the last 25 years. These companies also produce more challenging films, but only in limited numbers as productions other than comedies are financially risky in Austria unless foreign distribution can be secured.