{"id":"open-access","title":"How open is the published literature?","asOf":"2026-10-19","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 2026-10-19. Retrieved from https://seqdesk.org/data/open-access","data":{"schemaVersion":1,"generatedAt":"2026-10-19T14:34:16.819Z","asOf":"2026-10-19","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":0.527,"latestTotal":1676342,"latestOa":882919,"earliestYear":2010,"earliestShare":0.092},"series":[["2010",0.092],["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",0.398],["2021",0.453],["2022",0.509],["2023",0.489],["2024",0.479],["2025",0.527]],"byYear":{"2010":{"total":824354,"oa":75897,"share":0.092},"2011":{"total":877268,"oa":103576,"share":0.118},"2012":{"total":943583,"oa":141158,"share":0.15},"2013":{"total":997274,"oa":174652,"share":0.175},"2014":{"total":1045031,"oa":210677,"share":0.202},"2015":{"total":1090521,"oa":240986,"share":0.221},"2016":{"total":1117449,"oa":271094,"share":0.243},"2017":{"total":1128649,"oa":308920,"share":0.274},"2018":{"total":1173565,"oa":348747,"share":0.297},"2019":{"total":1230870,"oa":401631,"share":0.326},"2020":{"total":1404460,"oa":558345,"share":0.398},"2021":{"total":1559777,"oa":707013,"share":0.453},"2022":{"total":1576925,"oa":802200,"share":0.509},"2023":{"total":1498054,"oa":733024,"share":0.489},"2024":{"total":1538548,"oa":737356,"share":0.479},"2025":{"total":1676342,"oa":882919,"share":0.527},"2026":{"total":1512849,"oa":670971,"share":0.444,"partial":true}}}}