Record company revenues from sources other than unit sales of music increased by 7% in 2008. Accounting for around 18% of record companies’ income, these additional revenues totaled £195m. Record companies’ still see their main income from physical and digital unit sales, which generated £1.3bn in retail revenue in the UK during 2008. Digital licensing (including ad-supported models and subscriptions models) saw the most growth, with revenues from these new digital business models more than quadrupling in a year to £13.8m in 2008. Broadcasting and public performance licensing collection from PPL generated income of £78.7m. Artist-related income provided a revenue stream of £49.9m during 2008. Synchronisation license income, from the use of music in films, TV, games and advertising, declined slightly to £20.7m in 2008.