You guys live in the wrong countries for easy indie access.
This is a list of all the movies one can see in the cinema this week (all names are translated so apologies for that, but you can click on the names and it'll take you to a page with the original name, some data and a IMDB link)
The list shows 25 films of which only 10 aren't indie, and of those 10:
- Boss Baby is done
- Everything, Everything is done
- Wonder Woman is done
- The Mummy is pretty much done
So technically is more like 6 out of 21
Not all of these are being shown in all or even the same chains, but even then the ratios are not bad overall. For example the cinema nearest to my home is currently showing a total of 12 movies, of which 5 are indies.