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. 2023 Aug 8;6:138. doi: 10.1038/s41746-023-00885-w

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — Cannabis documentation (blue circles) and positive use (red circles) as a percentage of all notes collected each year and cannabis documentation (blue triangles) and positive use (red triangles) in OSM notes as a percentage of all OSM notes collected each year. The vertical dotted lines indicate the legalization of medical (2012, black) and recreational (2016, green) cannabis in Massachusetts, and the declaration of the COVID-19 pandemic (2020, magenta).