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|
Activities & Behaviors|1664|9678|14151|25070|28082|26218|27867|37795|36372|41126|44748|42195|41993|44550|56954|46024|44423|47872|53993|56539|60977|63555|62068|65805|83000|82129|88544|104822|98379|107856|117724|130170|142510|142594|137789|136414|143246|179295|194953|217156|223589|250648|267487|276388|276678|252416|
Anatomy|9300|74826|106253|157399|193039|193595|192460|243583|233262|256785|273432|246731|235132|206980|227667|233962|253006|260395|278812|282303|289720|294777|273903|275400|327014|314834|328449|363650|328097|337729|354811|513208|427546|491750|390168|417497|401795|411915|527126|527451|453270|470633|491247|496857|506899|457287|
Chemicals & Drugs|27554|238957|367066|517923|616369|603108|605737|806838|759902|837271|869276|790393|775036|646653|710269|760520|835636|908398|965251|991480|1054824|1093010|1028876|1053577|1256993|1263533|1350065|1510519|1387822|1449431|1569969|2180208|1972462|2155881|1898370|1972226|2091581|2063708|2355928|2433056|2330068|2259914|2401209|2341987|2327604|2086516|
Concepts & Ideas|2889|19996|31169|78229|108825|102789|106563|141832|141825|165669|164352|152032|147414|137242|168077|161273|159516|174616|188298|194119|208697|215678|200167|211939|267579|291517|328100|388623|378292|415868|456860|492929|560665|530596|561116|552975|619190|670179|746298|832502|851507|908726|985447|1013403|1035567|940488|
Devices|652|3721|4994|8953|10006|9889|9323|12464|12796|13349|14204|13304|13167|13468|13170|14078|13531|14180|15510|15819|16702|17474|15378|15398|18885|20636|20762|24134|20526|22454|22948|30237|28813|29245|26654|24687|29651|32427|38515|42111|42482|47964|56970|57459|57712|51342|
Disorders|23199|151157|185457|307187|346900|345458|333807|369774|348599|368779|379607|367009|361865|325332|338351|343520|384847|390582|423519|429869|447545|458902|428832|430616|509978|493217|503133|554003|493359|519919|544545|989523|656834|901223|615961|710429|647539|730259|981246|905705|800391|866505|933738|932635|951273|866235|
Genes & Molecular Sequences|26|462|948|1815|2292|2599|2966|4577|4474|5085|5971|5429|5764|5175|6425|6575|8210|9314|12665|14746|15165|16905|21990|31406|42843|57199|71079|87763|93668|107747|116796|108259|97355|85327|87122|83651|89701|81008|85932|97940|96550|98687|99452|100915|93973|81694|
Geographic Areas|2600|16690|19618|28494|34521|30145|29397|34187|32421|40950|41868|43948|41397|46080|47052|49014|41478|45401|48465|48398|50223|49778|50883|53644|65441|61712|67224|73658|69881|71518|79491|108472|87930|86152|88604|85175|90567|106951|107824|120633|120480|130492|138522|139452|140835|131537|
Living Beings|49714|340174|390335|539722|593816|576315|537851|619318|568192|607453|664973|709064|706649|669454|700626|728187|823235|842551|917856|924903|945578|970756|955532|966846|1171622|1117315|1137056|1249859|1141851|1190488|1258589|1367283|1527535|1415467|1439622|1401397|1491896|1571043|1678684|1795434|1818782|1949487|2040550|2065538|2201617|1997213|
Objects|1129|7982|11831|18135|22862|22549|22310|28362|26599|30193|29471|26526|25881|26078|28403|27214|27011|27081|32225|32189|32861|33830|31893|33383|37630|37828|38081|44294|38451|39895|42872|63932|53835|62800|53172|57271|59290|67848|86752|88801|84702|92264|105391|111652|114640|108834|
Occupations|4778|34270|39232|51537|55461|48105|51986|49823|41759|49833|45054|45145|41825|39492|41804|43020|38600|39997|43542|42154|45345|43955|41585|42265|49767|45095|46780|52906|48487|49997|55794|218111|64809|103260|61695|76697|65235|86187|117243|122389|96372|108352|123577|126178|118566|111591|
Organizations|612|4248|5491|8502|10448|9391|9190|11167|10949|13083|12686|11654|12724|17154|21990|17580|15437|14741|17086|17254|18095|18823|19533|20159|23016|22692|22881|27633|25410|25337|27615|32804|29378|34017|28917|28299|26999|34596|39880|40510|35477|38610|39962|38724|39241|36735|
Phenomena|1850|16159|24001|36644|44952|45556|46456|66536|56901|64254|64761|58230|51300|43574|49426|50088|50438|51537|55905|57279|60336|62147|56273|59040|71132|71560|72786|83032|73751|77883|85234|117303|105150|114037|104507|110229|122982|133573|155142|167428|169312|181223|207982|211343|210949|194047|
Physiology|6578|41740|67637|117994|146139|140250|148251|190335|180249|194751|195578|184429|175002|152734|168956|170729|179950|189079|203054|206132|215981|220267|205834|207894|254901|255214|272059|304802|279919|295402|318232|417506|397716|402675|385503|397438|426573|437811|502198|535626|540123|568969|598079|618065|627708|562043|
Procedures|14278|97219|131929|199630|228879|228934|227693|281303|274600|310977|300561|234474|233959|221241|247654|250614|266522|274893|301191|322161|339114|358564|343008|364580|467578|469240|500021|565388|513967|550752|588537|931479|725922|736750|698178|704029|746945|793826|913876|968348|969494|1021307|1073728|1101383|1136337|1041362|