sentences:  Previously, the timing of boxing involved 15 three-minute rounds with 14 one-minute intervals between each round, the preamble, and post-fight interviews—requiring around 70–75 minutes; in contrast, a 12-round bout lasts 47 minutes, which fits neatly into a one-hour time slot when pre- and post-fight programming and commercials are added in.However, by the 1990s, championship boxing had been almost exclusively become a premium pay-television (HBO, Showtime, pay-per-view) sport, meaning no commercials were necessary, and making that irrelevant.Nonetheless, it has been noted that these rule changes have made certain kinds of boxing deaths far rarer, though boxing remains the 8th most deadly sport with 1.3 deaths per 100,000 participants.