Hot 100 and the R&B chart in 1991. Today, all of the Billboard charts use this technology. Before September 1995, singles were allowed to chart in the week they first went on sale based on airplay points alone. The policy was changed in September 1995, to only allow a single to debut after a full week of sales on combined sales and airplay points. This allowed several tracks to debut at number one. In December 1998, the policy was further modified to allow tracks to chart on the basis of airplay alone without a commercial release. This change was made to reflect the changing realities of the music business. Previous to this, several substantial radio and MTV hits had not appeared on the Billboard chart at all, because many major labels chose not to release them as standalone singles, hoping their unavailability would spur greater album sales. Not offering a popular song to the public as a single was unheard of before the 1970s. The genres that suffered most at the time were those that increasingly impacted pop culture, including new genres such as trip hop and grunge. Among the many pre-1999 songs that had ended up in this Hot 100 limbo were The Cardigans' "Lovefool", Natalie Imbruglia's "Torn" (which peaked at 42), Goo Goo Dolls' "Iris" (which hit number 9), OMC's "How Bizarre", Sugar Ray's "Fly", and No Doubt's "Don't Speak". On June 25, 2015, Billboard made changes in its chart requirements. The official street date for all new album releases was moved from Tuesday to Friday in the United States. For all sales-based charts (ranking both albums and tracks), Billboard and Nielsen changed the chart reporting period to cover the first seven days of an album's release. As a result of the changes, The Billboard 200, top albums sales, genre-based albums, digital songs, genre-based downloads, streaming songs, and genre-focused streaming surveys ran on a Friday-to-Thursday cycle. Radio Songs, which informs the Hot 100, synced to the Monday-to-Sunday period after formerly covering Wednesday to Tuesday. All other radio charts and genre tallies followed the Monday-to-Sunday cycle. The move was made to coincide with the IFPI's move to have all singles and albums released globally on Fridays. Incorporation of digital platforms Starting on February 12, 2005, Billboard changed its methodology to include paid digital downloads from digital music retailers such as Rhapsody, AmazonMP3, and iTunes. This change also allowed songs