2019Network Manager (EUROCONTROL)18970 OpenSky Network (ADS-B)15904 2020Network Manager (EUROCONTROL)14654 OpenSky Network (ADS-B)13478 2021Network Manager (EUROCONTROL)17690 OpenSky Network (ADS-B)16348 2022Network Manager (EUROCONTROL)19063 OpenSky Network (ADS-B)18061