I included that as a PS specifically because they don't change overall numbers much. Yes, it's true some cancers are becoming less common, but ~50% of the population get's cancer it's very common even if the numbers are shifting around slightly.

Thanks for clarifying what you intended when you meant screening, which is differentiated from screening for cancer itself, which is how I read your upthread comment "[s]ome nipped a potentially fatal cancer in the bud".