{"id":"open-access","title":"How open is the published literature?","asOf":"2026-09-07","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 2026-09-07. Retrieved from https://seqdesk.org/data/open-access","data":{"schemaVersion":1,"generatedAt":"2026-09-07T13:17:03.115Z","asOf":"2026-09-07","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":0.524,"latestTotal":1678562,"latestOa":880081,"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",0.397],["2021",0.453],["2022",0.509],["2023",0.487],["2024",0.478],["2025",0.524]],"byYear":{"2010":{"total":824351,"oa":76353,"share":0.093},"2011":{"total":877269,"oa":103787,"share":0.118},"2012":{"total":943574,"oa":141177,"share":0.15},"2013":{"total":997274,"oa":174676,"share":0.175},"2014":{"total":1045032,"oa":210728,"share":0.202},"2015":{"total":1090500,"oa":241132,"share":0.221},"2016":{"total":1117426,"oa":271181,"share":0.243},"2017":{"total":1128652,"oa":308996,"share":0.274},"2018":{"total":1173561,"oa":348762,"share":0.297},"2019":{"total":1230883,"oa":401656,"share":0.326},"2020":{"total":1404478,"oa":558139,"share":0.397},"2021":{"total":1559795,"oa":706906,"share":0.453},"2022":{"total":1576332,"oa":801833,"share":0.509},"2023":{"total":1493381,"oa":728005,"share":0.487},"2024":{"total":1536963,"oa":734417,"share":0.478},"2025":{"total":1678562,"oa":880081,"share":0.524},"2026":{"total":1351790,"oa":524392,"share":0.388,"partial":true}}}}