Hot Country Songs and Country Airplay are charts that rank the top-performing country music songs in the United States, published by Billboard magazine. Hot Country Songs ranks songs based on digital downloads, streaming, and airplay, not only from country stations but from stations of all formats, a methodology introduced in 2012. Country Airplay, which was published for the first time in 2012, is based solely on country radio airplay, a methodology which had previously been used for several decades for Hot Country Songs. In 2015, 10 different songs topped the Hot Country Songs chart and 39 different songs topped Country Airplay in 52 issues of the magazine.