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Data source: AI analysis of xkcd comics
Additional Info: I designed a Python workflow to perform OCR on every xkcd comic, feed that text into a large language model, and ask the model whether this comic was about the category named in the title.

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xkcd comics published about nostalgia correlates with...

VariableCorrelationYearsHas img?
Air pollution in Kingston, New Yorkr=0.996yrsNo
The number of transportation security screeners in North Dakotar=0.9111yrsNo
Air pollution in Rocky Mount, North Carolinar=0.97yrsNo
Final Match Score Difference in the Volkswagen Challenger Setr=0.876yrsNo
Air pollution in Orlandor=0.8612yrsNo
The number of movies Ian Holm appeared inr=0.868yrsNo
Air pollution in Greenwood, South Carolinar=0.866yrsNo
Air pollution in Middlesborough, Kentuckyr=0.8310yrsNo
How professional-sounding Simone Giertz's YouTube video titles arer=0.810yrsNo
Electricity generation in Jamaicar=0.7715yrsNo
How trendy Technology Connections YouTube video titles arer=0.759yrsNo
Kerosene used in El Salvadorr=0.715yrsYes!
The number of movies Joan Crawford appeared inr=0.6611yrsNo
Popularity of the first name Harryr=0.6216yrsNo
Jet fuel used in Malawir=0.5915yrsNo
Popularity of the first name Jessr=0.5116yrsNo



xkcd comics published about nostalgia also correlates with...

VariableCorrelationYearsSys. Score
Air pollution in Sevierville, Tennesseer=0.886yrs212
Air pollution in Raleigh, North Carolinar=0.876yrs200
Divorce rates in the United Kingdomr=0.856yrs151
The number of college sociology teachers in Tennesseer=0.8215yrs149
Electricity generation in United Statesr=0.7415yrs144
How provocative LEMMiNO YouTube video titles arer=0.7312yrs144
The number of cabinetmakers in Alabamar=0.7716yrs142
The number of movies Nicolas Cage appeared inr=0.6617yrs140
Popularity of the first name Moeshar=0.748yrs134
Ana Ivanovic's WTA Finals playedr=0.748yrs132
Google searches for 'spiderman'r=0.6317yrs129
Popularity of the first name Katlinr=0.699yrs127
Google searches for 'harry potter'r=0.6117yrs126
Motor vehicle thefts in Kansasr=0.7116yrs126
Number of edits to the Wikipedia article for Thomas Edisonr=0.616yrs126
Yearly peak of NYSE composite indexr=0.776yrs124
ORIX Corporation's stock price (IX)r=0.6117yrs124
Citigroup's stock price (C)r=0.5917yrs122
Sumitomo Mitsui Financial Group's stock price (SMFG)r=0.617yrs122
Google searches for 'shrek'r=0.5617yrs119
Worldwide count of earthquakes with a magnitude between 8.0 and 9.9r=0.5815yrs118
The average age of batters for the San Francisco Giantsr=0.7117yrs118
Popularity of the 'slaps roof of car' memer=0.5217yrs118
Number of edits to the Wikipedia article for George Washingtonr=0.5317yrs117
The number of detectives and criminal investigators in Illinoisr=0.7716yrs112
How nerdy Extra History YouTube video titles arer=0.6912yrs108
Kerosene used in Eritrear=0.6915yrs103
Popularity of the first name Jabarir=0.6216yrs94
The number of movies Keira Knightley appeared inr=0.5417yrs92
Petroluem consumption in Antarcticar=0.6715yrs90
How provocative SmarterEveryDay YouTube video titles arer=0.617yrs89
The number of fire inspectors in Idahor=0.7812yrs86
Google searches for 'Baroque Obama'r=0.517yrs86
UBS Group AG's stock price (UBS)r=0.5517yrs86
Popularity of the first name Jackr=0.6116yrs82
The number of movies Matt Damon appeared inr=0.5317yrs80
Electricity generation in Czechiar=0.6415yrs78
How insightful minutephysics YouTube video titles arer=0.6113yrs76
Air pollution in Charlotte, North Carolinar=0.8410yrs75
The number of zoologists in Tennesseer=0.7415yrs74
Popularity of the first name Ricor=0.6116yrs72
Biomass power generated in Panamar=0.6415yrs68
Air pollution in Montgomery, Alabamar=0.8311yrs64
Average views of OverSimplified YouTube videosr=0.77yrs64
The number of aircraft mechanics in Alaskar=0.7416yrs63
Popularity of the first name Joannar=0.616yrs60
Petroluem consumption in United Statesr=0.6516yrs58
Air pollution in Berlin, New Hampshirer=0.8311yrs54
Total comments on 'Be Smart' science YouTube videosr=0.6111yrs54
The number of school teachers in New Yorkr=0.7513yrs53
Popularity of the first name Jodier=0.5816yrs48
Liquefied petroleum gas used in Cabo Verder=0.6515yrs47
Air pollution in Huntington, Indianar=0.8310yrs44
The number of locomotive engineers in Louisianar=0.7612yrs42
Popularity of the first name Ednar=0.5816yrs38
Total views on OverSimplified YouTube videosr=0.667yrs38
Jet fuel used in U.S. Virgin Islandsr=0.6515yrs37
The number of exercise physiologists in New Yorkr=0.7711yrs32
How clickbait-y Technology Connections YouTube video titles arer=-0.929yrs28
Gasoline pumped in Saint Helenar=0.6415yrs26
Popularity of the first name Meredithr=0.5716yrs26
Air pollution in New Orleans, Louisianar=0.848yrs23
The number of criminal justice and law enforcement teachers in Nebraskar=0.7414yrs21
How 'hip and with it' 3Blue1Brown YouTube video titles arer=0.649yrs17
Liquefied petroleum gas used in Icelandr=0.6316yrs15
Air pollution in Tampa, Floridar=0.8210yrs12
The number of chemical engineers in Iowar=0.7216yrs10
Average length of Casually Explained YouTube videosr=0.649yrs7
Gasoline pumped in Germanyr=0.6216yrs4
Air pollution in Walterboro, South Carolinar=0.8210yrs2
The number of food service managers in Alaskar=0.716yrs-3
Total length of Casually Explained YouTube videosr=0.649yrs-3
Air pollution in Worcester, Massachusettsr=0.8210yrs-8
Kerosene used in Guinear=0.6215yrs-8
The number of criminal justice and law enforcement teachers in Illinoisr=0.716yrs-13
Air pollution in Clarksville, Tennesseer=0.846yrs-19
Fossil fuel use in The Bahamasr=0.5915yrs-19
The number of automotive service technicians and mechanics in Nebraskar=0.716yrs-23
Kerosene used in Central African Republicr=0.6115yrs-29
Air pollution in Ashtabula, Ohior=0.836yrs-30
Petroluem consumption in The Bahamasr=0.6115yrs-39
Air pollution in Kingsport, Tennesseer=0.836yrs-40
Electricity generation in The Bahamasr=0.5815yrs-50
Air pollution in Jacksonville, Floridar=0.7812yrs-52
Air pollution in Americus, Georgiar=0.7910yrs-62
Petroluem consumption in Luxembourgr=0.5816yrs-62


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You caught me! While it would be intuitive to sort only by "correlation," I have a big, weird database. If I sort only by correlation, often all the top results are from some one or two very large datasets (like the weather or labor statistics), and it overwhelms the page.

I can't show you *all* the correlations, because my database would get too large and this page would take a very long time to load. Instead I opt to show you a subset, and I sort them by a magic system score. It starts with the correlation, but penalizes variables that repeat from the same dataset. (It also gives a bonus to variables I happen to find interesting.)
Error :(