Statistics: Chinese J. Chem., 9(3), 262-269 (1991)

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Region #
Unknown 80
Total 80
Country #
Unknown 80
Total 80
City #
Unknown 80
Total 80


Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Tot
2022 125 1000 0000 00 27
2023 00 0003 8010 10 13
2024 00 2510 0000 00 8
2025 00 0000 0235 140 24
2026 08 0000 0000 00 8
Ever 80