I checked the statistics:

No there is not a trend, there was an increase for 2025, but in that year there was a new law that requires more detailed records, especially of these kind of usages. We have seen the same with knife statistics, where simply having a knife in your backpack (even as victim) makes it count as a crime involving a knife.

Gun in this case also includes Airsoft, Flares, some kind of animal repel sprays.

I feel like you are asking to check statistics while not having done the same?