I'm looking for common standards (file formats) for how most statistics software packages import data.
The reason is that I'm going to make an export function for a simulation software package.
The data to be exported consists of time-series of (1 or more) values for all members of a population. The population size can be in the 100,000's. The length of the time-series is typically in the 1,000's. The number of values per member per timestep can range from 1 to 20.
How is such data typically imported by statistics packages?