24.486387.24 «90% POPULAR»

Such as March 24th or the 24th day of a dataset cycle. Country estimates - UNICEF Data

While the core number is widely cited in Swiss government data, the ".24" at the end likely refers to: 24.486387.24

It is listed as a degree value for Venus in astronomical seeing reports. Such as March 24th or the 24th day of a dataset cycle