Here is the Brisbane radio ratings for that survey.
#1 B105: 17.9
#2 97.3: 13.2
#3 4MMM: 12.9
#4 4KQ: 11.1
#5 4BC: 9.6
#6 ABC612: 6.7
#7 4JJJ: 5.6
#8 4BH: 5.4
#9 4RN: 3.4
#10 ABCFM: 3.3
#11 NEWSR: 2.1
Other Stations: 8.8%
It’s worth noting that Nova had yet to arrive in Brisbane (the 106.9 licence was yet to be auctioned at that point), whilst the Other Stations’ ratings were not nearly as high as they are now.