I've been asked where I get my lists from, because sometimes (like the example below) the year doesn't seem to match up. I gather material from a combination of several archived Billboard charts, magazine charts and reviews, and trade tip sheets. Plus anything else that carries verifiable information.
Former morning DJ on Lightning 100, an independent radio station in Nashville, WEQX, in Southern Vt/Albany NY, and WQBK-FM in Albany. My fascination with music started with Nancy Sinatra and Tom Lehrer (thanks, Dad) and continues with today's young upstarts and others who push the art forward, sometimes swimming upstream.