By Anna Moloney Super Bowl LVIII has smashed TV viewing records, but the way we collect ratings may surprise you. Here’s how it’s done. The 2024 Super Bowl has been crowned the second most-watched US television broadcast in history, second only to the Apollo moon landing in 1969. The record has been partly attributed to omnipotent pop star Taylor Swift (whose romance with Kansas City Chiefs tight end Travis Kelce brought in a new demographic of fans to the American sport), but also to the less bejewelled matter of data collection. How are TV ratings calculated?US analytics firm Nielsen said th…