Yearly fixed datasets used for WMO GHG Bulletins and WDCGG Data Summaries are available in tgz format. See the data version history.
Unique DOIs are issued for individual yearly fixed archived datasets by WDCGG. The same file name is used for different years.

Updated Date	Version	Gas Species	DOI	WMO GHG Bulletin Volume	WDCGG Data Summary Volume	Included data period	Details
2023-11-10 07:51:55	the latest version	O2/N2 ratio					click
2023-11-10 07:51:55	2023-11-10_07-51-55	O2/N2 ratio	10.50849/WDCGG_O2N2_ALL_2024	No. 20	No. 49 (planned)	2012/05/14 - 2020/03/10	click
2023-08-16 09:14:53	2023-08-16_09-14-53	O2/N2 ratio	10.50849/WDCGG_O2N2_ALL_2023	No. 19	No. 48	2012/05/14 - 2020/03/10	click
2021-09-22 06:43:59	2021-09-22_06-43-59	O2/N2 ratio	10.50849/WDCGG_O2N2_ALL_2022	No. 18	No. 47	2012/05/14 - 2020/03/10	click

These datasets are only available from 2018 onward.