Competition between Eurostar and airline services was a large factor in ticket prices being reduced from the initial levels.[88][89] Business Premier fares also slightly undercut air fares on similar routes, targeted at regular business travellers.[90] In 2009, Eurostar greatly increased its budget ticket availability to help maintain and grow its dominant market share.[citation needed] The Eurostar ticketing system is very complex, being distributed through no fewer than 48 individual sales systems.[91] Eurostar is a member of the Amadeus CRS distribution system, making its tickets available alongside those of airlines worldwide.[92]