{"id":"open-access","title":"How open is the published literature?","asOf":"2026-06-25","source":"https://seqdesk.org/data/open-access","license":"Aggregate facts compiled by SeqDesk from public archives (EMBL-EBI / Europe PMC) and re-served under each source's terms. Only whole-archive percentages and counts are published — no record-level identifiers. Provided as-is, no warranty. Full method & sources: https://seqdesk.org/data/open-access","citation":"SeqDesk (2026). How open is the published literature? [original data analysis]. Snapshot 2026-06-25. Retrieved from https://seqdesk.org/data/open-access","data":{"schemaVersion":1,"generatedAt":"2026-06-25T08:27:29.310Z","asOf":"2026-06-25","title":"How open is the published literature?","subtitle":"The share of the MEDLINE-indexed journal literature that Europe PMC flags as open access — free-to-read full text rather than paywalled — by publication year, re-counted weekly from whole-index hit counts.","source":"EMBL-EBI / Europe PMC (REST search, whole-index hit counts)","denominator":"MEDLINE-indexed journal articles (SRC:MED), by publication year","headline":{"latestYear":2025,"latestShare":0.518,"latestTotal":1688090,"latestOa":874108,"earliestYear":2010,"earliestShare":0.093},"series":[["2010",0.093],["2011",0.118],["2012",0.15],["2013",0.175],["2014",0.202],["2015",0.221],["2016",0.243],["2017",0.274],["2018",0.297],["2019",0.326],["2020",0.399],["2021",0.455],["2022",0.509],["2023",0.485],["2024",0.468],["2025",0.518]],"byYear":{"2010":{"total":824369,"oa":76327,"share":0.093},"2011":{"total":877289,"oa":103774,"share":0.118},"2012":{"total":943589,"oa":141174,"share":0.15},"2013":{"total":997285,"oa":174698,"share":0.175},"2014":{"total":1045059,"oa":210734,"share":0.202},"2015":{"total":1090536,"oa":241091,"share":0.221},"2016":{"total":1117416,"oa":271165,"share":0.243},"2017":{"total":1128660,"oa":308963,"share":0.274},"2018":{"total":1173525,"oa":348681,"share":0.297},"2019":{"total":1230869,"oa":401411,"share":0.326},"2020":{"total":1404539,"oa":560583,"share":0.399},"2021":{"total":1559822,"oa":709696,"share":0.455},"2022":{"total":1576289,"oa":802928,"share":0.509},"2023":{"total":1493436,"oa":724556,"share":0.485},"2024":{"total":1537218,"oa":719948,"share":0.468},"2025":{"total":1688090,"oa":874108,"share":0.518},"2026":{"total":985655,"oa":380362,"share":0.386,"partial":true}}}}