Inflation and premium charge are surely in upward trending, despite having only 2 IMAX screens(for real? even in malaysia we have like 6 IMAXs)
Drop in attendance act as an opposite force to the inflation+premium charge. I can safely assume the net effect to either direction could be minimal to allow us to look at nominal gross straight away.
And to your decline in money of insidekino. I see no structural change of decline in term of nominal gross. It's all standard fluctuation
And, of course , the counteract cannot be lasted like forever, but so far, the market , let's say Germany, showing no force of giving up.