See the data version history.
The data of old versions are available only if the versions are included in Yearly fixed datasets.

 CFC-11 _ ZEP6001 _ surface - insitu _ NILU _ data1

Updated Date	Version † met : with meteorological data	Details
2024-12-24	0054-6001-1303-01-01-9999 -2025-01-01-0054	The latest version
2023-06-21	0054-6001-1303-01-01-9999 -2023-06-21-0956	Included in Yearly Fixed Dataset 2024
2020-07-03	0054-6001-1303-01-01-9999 -2020-07-03-1701	Included in Yearly Fixed Dataset 2022
2018-06-13	0054-6001-1303-01-01-9999 -2018-02-27-0912	Included in Yearly Fixed Dataset 2019