Billboard Country Number-One Songs, 2009 onwards Quiz

Every distinct song to finish a year at number one on Billboard's country year-end chart between 2009 to the present: 16 distinct songs across 17 chart years; a repeat winner appears once, under the first year it led, taken from the same published table as the complete run. This is the era cut, for when the full set from 1946 is more than you want in one sitting. Name each from its year, pick the year's real number one from a group of genuine chart-toppers, match each song to the artist credited with it, sort a selection into the order they led, or tap the era's number ones out of a grid seeded with real number ones of the same chart from other eras. Parsed verbatim from the published year-end table; no answer is named here.