Also of note:Effective this week, the methodology for the Hot 100, along with Billboard's genre hybrid songs charts, has changed slightly to rebalance desired chart ratios for sales, airplay and streaming, as the chart's streaming component has often been above its desired average ratio, and download sales noticeably below, in recent weeks. Such adjustments to these multi-data pool charts are common (and have been implemented on the Hot 100 when, for example, sales had increased exponentially).
So happy for Hozier, the song is already a classic though to be honest I expected it to peak in the top 20 or lower top 10 at best. Hope it doesn't peak at 3 like Tove.