{"id":"open-access","title":"How open is the published literature?","asOf":"2026-11-09","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 2026-11-09. Retrieved from https://seqdesk.org/data/open-access","data":{"schemaVersion":1,"generatedAt":"2026-11-09T17:16:59.444Z","asOf":"2026-11-09","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":0.528,"latestTotal":1673992,"latestOa":883521,"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",0.481],["2025",0.528]],"byYear":{"2010":{"total":824285,"oa":75895,"share":0.092},"2011":{"total":877259,"oa":103572,"share":0.118},"2012":{"total":943548,"oa":141156,"share":0.15},"2013":{"total":997199,"oa":174647,"share":0.175},"2014":{"total":1044950,"oa":210671,"share":0.202},"2015":{"total":1090388,"oa":240987,"share":0.221},"2016":{"total":1117369,"oa":271079,"share":0.243},"2017":{"total":1128623,"oa":308908,"share":0.274},"2018":{"total":1173565,"oa":348773,"share":0.297},"2019":{"total":1230866,"oa":401634,"share":0.326},"2020":{"total":1404449,"oa":558398,"share":0.398},"2021":{"total":1559628,"oa":707060,"share":0.453},"2022":{"total":1576856,"oa":802196,"share":0.509},"2023":{"total":1498196,"oa":733194,"share":0.489},"2024":{"total":1538365,"oa":739245,"share":0.481},"2025":{"total":1673992,"oa":883521,"share":0.528},"2026":{"total":1631721,"oa":733427,"share":0.449,"partial":true}}}}