Like an exit poll, they tell us what people have actually voted for with their ears, and this time Downtown/Cool FM achieved a majority year-on-year, with 601,000 listeners tuning in to the Newtownards-based broadcaster each week.
Individually, Downtown increased in both reach (293,000 to 299,000) and hours (up by 25%), while Cool FM dipped in reach (361,000 to 349,000), though this is offset by a similar increase in hours (up 22%).
BBC Radio Ulster was the next most successful, but saw a slight drop in both reach (530,000 to 524,000) and hours (down 8%) across the year.
Citybeat and the Q Network, now jointly owned, will be happy with their increases in reach (Citybeat: 136,000 to 145,000; Q: 91,000 to 125,000) and hours (Citybeat up 33%; Q up 3%).
As in politics, not all parties stand in all constituencies, and U105 covers a smaller than provincewide area on FM. Its reach went from last year's figure of 192,000 to 180,000 now, and hours were down by 12%.
This research period ended before Downtown Country had launched on DAB, so keeping with the electoral analogy, it will be on the ballot paper next time.
*RAJAR is compiled by Ipsos-MORI. The figures for each station relate to its own Total Survey Area.
More RAJAR analysis:
The national picture from Matt Deegan: http://www.mattdeegan.com
Paul Easton with the London perspective: http://www.pauleaston.blogspot.co.uk