If they'd said since 1978 and before, or 1979 and after, this would've been easy. Each successive decade after 1970 was less great than the one before it. One problem with the poll is the issue with when it was written vs. when it was first recorded, or when the BEST (relatively speaking) recording was made. Most of my collecting resources have gone to Classical/Jazz with Rock that actually required effort to write, arrange and perform included. Dates aren't as important. But as another poster has already pointed out, about 90-ish percent of what's been done in popular music since the turn of the Century is singularly uninspiring to me. Music was my chosen career, btw...