What fraction of all total soft plastic is collected by supermarket take back schemes compared to road side curb collection (where only 10% of municipalities "s

What fraction of all total soft plastic is collected by supermarket take back schemes compared to road side curb collection (where only 10% of municipalities "support" its recycling)? I have a strong prior that they can achieve such high numbers only because they only capture a small amount of the total amount of soft plastic waste. If they had to deal with it all there wouldn't be enough demand to burn or recycle and it would end up buried. This is somewhat supported by the fact that by official definitions supermarket take back schemes are not counted in official recyclability numbers: > Soft plastic collected via supermarket collection points does not satisfy this definition [of working at scale] and therefore was not counted towards WRAP’s UK Plastics Pact recyclability target.