Statistics: Proceedings of the National Academy of Sciences

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Region	#
AS - Asia, other	81
NA - North America	7
EU - Europe	2
Total	90

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Country	#
CN - China	81
US - United States of America	7
DE - Germany	1
RU - Russian Federation	1
Total	90

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City	#
Hangzhou	12
Xianyang	2
Boardman	1
Guiyang	1
Shanghai	1
St Petersburg	1
Total	18

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	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Tot
2020	0	0	0	0	0	0	0	0	2	1	0	0	3
2021	1	2	2	9	18	11	1	6	2	3	9	5	69
2022	3	0	0	0	0	0	0	0	0	0	0	0	3
2023	0	0	0	0	0	0	0	0	0	0	0	1	1
2024	0	0	1	13	0	0	0	0	0	0	0	0	14
Ever													90