SemGroup|1965|1966|1967|1968|1969|1970|1971|1972|1973|1974|1975|1976|1977|1978|1979|1980|1981|1982|1983|1984|1985|1986|1987|1988|1989|1990|1991|1992|1993|1994|1995|1996|1997|1998|1999|2000|2001|2002|2003|2004|2005|2006|2007|2008|2009|2010|2011|2012|
Activities & Behaviors|1666|9714|14214|25151|28184|26365|27994|37915|36476|41212|44895|42376|42153|44681|57071|46148|44544|47621|53859|56452|60930|63488|62045|65758|82979|82131|88497|104696|98315|107762|117707|130470|142541|143018|137844|136610|143423|179441|195301|217627|223814|250999|268327|277248|277028|282756|286965|268505|
Anatomy|9309|74859|106257|157404|193008|193588|192489|243665|233280|256865|273225|246435|234949|206829|227483|233786|252792|260214|278623|282152|289470|294590|273716|275254|326822|314655|328309|363607|328037|337644|354723|513459|427389|490614|390050|417626|401704|411706|527101|528110|453220|470684|491801|497582|506809|514709|508520|466631|
Chemicals & Drugs|27502|238547|366196|516887|615030|601880|604369|805043|758206|835412|867488|788648|773748|645648|709345|759660|834840|907785|965094|991439|1054813|1093078|1029080|1054017|1257955|1264655|1351847|1512438|1390129|1452116|1573095|2183570|1977780|2159115|1904349|1982069|2099643|2073587|2374969|2448751|2343441|2275558|2419320|2364767|2349552|2359573|2343000|2181752|
Concepts & Ideas|2889|19996|31169|78235|108837|102801|106576|141878|141859|165740|164357|152105|147469|137310|168120|161345|159592|174652|188413|194161|208746|215735|200212|211983|267616|291549|328127|388570|378289|415831|456815|493118|560621|530696|561008|553527|619076|670257|747203|833230|851369|908476|985126|1013203|1035354|1045218|1072952|1009077|
Devices|652|3721|4994|8953|10006|9889|9323|12464|12796|13349|14199|13304|13167|13468|13170|14077|13531|14180|15510|15819|16702|17474|15380|15415|18895|20652|20770|24148|20530|22458|22956|30242|28818|29215|26657|24694|29657|32435|38517|42125|42485|47970|57000|57516|57717|57064|56824|51772|
Disorders|23167|150917|185208|306727|346352|344935|333436|369362|348121|368244|379168|366428|361357|324897|337800|343004|384313|390004|422929|429219|446874|458239|428157|429980|509202|492614|502426|553343|492729|519215|543847|989733|656047|903371|615140|713626|646868|731509|994275|911495|799487|865653|934386|934614|950330|987548|989141|913989|
Genes & Molecular Sequences|26|462|948|1815|2292|2599|2966|4574|4474|5083|5970|5429|5764|5175|6425|6575|8211|9313|12665|14746|15167|16906|21991|31406|42843|57195|71079|87763|93668|107746|116797|108259|97356|85327|87123|83651|89703|81015|85955|97972|96569|98713|99464|100949|93991|90754|92528|87096|
Geographic Areas|2600|16690|19618|28494|34521|30145|29397|34187|32421|40950|41868|43977|41412|46097|47061|48995|41509|45409|48511|48417|50237|49795|50899|53655|65448|61715|67227|73649|69878|71503|79479|108566|87928|86166|88603|85176|90567|106948|107843|120641|120477|130498|138861|140058|140833|148798|159206|149043|
Living Beings|49707|340118|390283|539654|593756|576222|537746|619202|568125|607327|664893|708874|706633|669433|700614|728178|823204|842539|917846|924885|945565|970725|955522|966838|1171605|1117286|1137043|1249771|1141827|1190436|1258553|1367315|1527492|1417071|1439569|1403988|1491839|1572245|1681391|1796318|1818692|1949582|2040871|2066286|2201493|2224011|2333955|2169481|
Objects|1117|7922|11791|18008|22776|22390|22214|28242|26524|30120|29416|26459|25799|26013|28359|27169|26961|27045|32183|32152|32830|33794|31858|33346|37583|37774|38041|44272|38436|39873|42836|63682|53765|62759|53120|57240|59254|67762|86512|88704|84659|92258|105405|111751|114608|122593|127889|123597|
Occupations|4778|34269|39232|51537|55461|48104|51986|49822|41759|49832|45053|45171|41836|39512|41817|43040|38655|40006|43599|42190|45359|43981|41620|42289|49778|45099|46785|52897|48482|49989|55790|235298|64807|102796|61695|76837|65235|86289|117430|122472|96369|108365|124229|127008|118571|129228|123003|111364|
Organizations|612|4248|5491|8502|10448|9391|9190|11167|10949|13083|12686|11667|12724|17154|21991|17581|15439|14742|17091|17255|18101|18826|19528|20159|23016|22692|22881|27621|25407|25336|27614|32794|29376|34422|28917|28362|26999|34614|39926|40579|35485|38632|40006|38860|39244|41236|43305|40520|
Phenomena|1852|16171|24025|36694|45020|45632|46514|66614|56960|64334|64820|58278|51342|43604|49465|50141|50468|51559|55930|57307|60352|62188|56302|59059|71167|71606|72847|83098|73785|77922|85332|117569|105249|113851|104621|110713|123112|133909|155785|167882|169523|181465|208455|211817|211270|218652|234782|221698|
Physiology|6578|41739|67637|117992|146138|140250|148251|190330|180248|194741|195546|184373|174790|152560|168747|170540|179737|188874|202855|205933|215788|220096|205677|207766|254760|255078|271929|304660|279830|295301|318101|417560|397574|401955|385385|397065|426462|437505|502263|535615|539959|568858|598011|618135|627540|626598|640714|600819|
Procedures|14285|97240|131926|199669|228922|228947|227693|281291|274676|311040|300596|234412|234036|221350|247758|250733|266719|275022|301379|322374|339368|358799|343233|364779|467789|469341|500098|565474|513805|550554|587994|938941|725118|741076|697081|704746|745365|793345|915785|967997|967767|1019740|1072484|1100998|1135535|1161885|1195217|1106143|