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
2022-07-13 12:25:39	the latest version	13CH4					click
2021-07-07 10:51:25	2021-07-07_10-51-25	13CH4	10.50849/WDCGG_13CH4_ALL_2021	No. 17	No. 46	1991/01/01 - 2020/12/13	click
2020-09-02 16:41:36	2020-09-02_16-41-36	13CH4	10.50849/WDCGG_13CH4_ALL_2020	No. 16	No. 45	1991/01/28 - 2019/04/30	click
2019-09-03 17:01:13	2019-09-03_17-01-13	13CH4	10.50849/WDCGG_13CH4_ALL_2019	No. 15	No. 44	1991/01/28 - 2018/07/30	click
2018-10-18 08:28:24	2018-10-18_08-28-24	13CH4	10.50849/WDCGG_13CH4_ALL_2018	No. 14	No. 43	1991/01/28 - 2017/12/31	click

These datasets are only available from 2018 onward.