I am trying to get the following information. I would like to know for each day how many aircraft have taken off and departed from a specific country. This information should be up to date and possibly have also some historical time series as well (for example the last month). I know i could get such information by paying some services like Flight Aware or FlightRadar24 but I need to do it for free. I tried OpenSky but the API doesn't offer much information (just time, lat/lon, origin). Do you know a possible way to gather such information? It doesn't need to be machine readable as long it has the info.
Thanks in advance.