Sources

Data Sources

The Delusion Calculator uses real demographic data from official government statistics, national health surveys, and reputable research organizations. Below is a comprehensive list of all data sources used for each of our 40+ country calculators, along with explanations of what each source provides.

How We Use the Data

For each country, we gather data across several categories:

• Demographics & Age Distribution — Population age breakdowns from national census data
• Marriage & Relationship Status — Marital status rates, cohabitation patterns, and divorce statistics
• Income Distribution — Median income and income percentile data from labor/statistics bureaus
• Height & Body Composition — Average heights and BMI/obesity rates from health surveys (CDC, NHS, WHO, etc.)
• Sexuality & LGBTQ+ Identification — Self-identification rates from polls and census data
• Race & Ethnicity — Population composition from census data using country-specific categories
• Eye & Hair Color — Population estimates from genetic studies and demographic surveys

All percentages are estimates based on the most recent available data. Where exact figures aren’t available for a specific country, we use data from the closest comparable source.

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Sources by Country

United States

• US Census Bureau — demographics, marital status, fertility
• Bureau of Labor Statistics — income distribution
• CDC NHANES — BMI, height
• Gallup — LGBTQ+ identification
• World Population Review — hair color

Canada

• Statistics Canada — demographics, income
• Health Canada — BMI, height
• Gallup / Ipsos — sexuality

United Kingdom

• ONS — demographics, income
• NHS Digital — BMI, height
• Gallup / ONS — sexuality

Germany

• Destatis — demographics, income
• RKI — BMI, height
• LSVD / Ipsos — sexuality

Australia

• ABS — demographics, income
• AIHW — BMI, height
• ABS / Gallup — sexuality

India

• Census of India — demographics
• NSSO / PLFS — income
• NFHS — BMI, height

Poland

• GUS — demographics, income
• NIZP-PZH — BMI, height
• CBOS / Ipsos — sexuality

Netherlands

• CBS — demographics, income
• RIVM — BMI, height
• SCP / Ipsos — sexuality

France

• INSEE — demographics, income
• DREES — BMI, height
• IFOP / Ipsos — sexuality

Brazil

• IBGE — demographics, income
• VIGITEL / MS — BMI, height
• Datafolha / Ipsos — sexuality

Croatia

• DZS — demographics, income
• HZJZ — BMI, height
• Ipsos — sexuality

Sweden

• SCB — demographics, income
• Folkhalsomyndigheten — BMI, height
• SCB / Ipsos — sexuality

Spain

• INE — demographics, income
• ENSE — BMI, height
• CIS / Ipsos — sexuality

Switzerland

• BFS — demographics, income
• BAG — BMI, height
• Ipsos — sexuality

Italy

• ISTAT — demographics, income
• ISS — BMI, height
• ISTAT / Ipsos — sexuality

Russian Federation

• Rosstat — demographics, income
• GNIC PM — BMI, height
• Levada / VTsIOM — sexuality

Mexico

• INEGI — demographics, income
• ENSANUT — BMI, height
• INEGI / Ipsos — sexuality

Finland

• Statistics Finland — demographics, income
• THL — BMI, height
• Ipsos — sexuality

Austria

• Statistik Austria — demographics, income
• GÖG — BMI, height
• Ipsos — sexuality

Romania

• INS — demographics, income
• INSP — BMI, height
• Ipsos — sexuality

Belgium

• Statbel — demographics, income
• Sciensano — BMI, height
• Ipsos — sexuality

Norway

• SSB — demographics, income
• FHI — BMI, height
• SSB / Ipsos — sexuality

Denmark

• DST — demographics, income
• SST — BMI, height
• DST / Ipsos — sexuality

Singapore

• DOS — demographics, income
• HPB — BMI, height
• Ipsos — sexuality

Turkey

• TurkStat — demographics, income
• HSGM — BMI, height
• Ipsos — sexuality

South Africa

• Stats SA — demographics, income
• SADHS — BMI, height
• Ipsos — sexuality

Czech Republic

• CZSO — demographics, income
• UZIS — BMI, height
• Ipsos — sexuality

New Zealand

• Stats NZ — demographics, income
• Ministry of Health — BMI, height
• Stats NZ / Gallup — sexuality

Ireland

• CSO — demographics, income
• HSE — BMI, height
• CSO / Ipsos — sexuality

Hungary

• KSH — demographics, income
• NNK — BMI, height
• Ipsos — sexuality

Portugal

• INE — demographics, income
• DGS — BMI, height
• Ipsos — sexuality

Philippines

• PSA — demographics, income
• FNRI — BMI, height
• Ipsos — sexuality

Serbia

• RZS — demographics, income
• IZJZ — BMI, height
• Ipsos — sexuality

Israel

• CBS — demographics, income
• MoH — BMI, height
• Ipsos — sexuality

Japan

• e-Stat — demographics, income
• MHLW — BMI, height
• Ipsos — sexuality

Bulgaria

• NSI — demographics, income
• NCPHA — BMI, height
• Ipsos — sexuality

Slovenia

• SURS — demographics, income
• NIJZ — BMI, height
• Ipsos — sexuality

South Korea

• KOSTAT — demographics, income
• KDCA — BMI, height
• Ipsos — sexuality

Greece

• ELSTAT — demographics, income
• EODY — BMI, height
• Ipsos — sexuality

Argentina

• INDEC — demographics, income
• ENFR — BMI, height
• Ipsos — sexuality

Lithuania

• OSP — demographics, income
• HI — BMI, height
• Ipsos — sexuality

Colombia

• DANE — demographics, income
• ENSIN — BMI, height
• Ipsos — sexuality

Bosnia And Herzegovina

• BHAS — demographics, income
• ZZJZ — BMI, height
• Ipsos — sexuality

Hong Kong

• C&SD — demographics, income
• DH — BMI, height
• Ipsos — sexuality

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General Methodology Notes

• All calculations are performed client-side in your browser — no data is sent to our servers.
• Each filter dimension is treated as an independent probability factor. The final percentage is the product of all selected filter percentages.
• When a filter is set to “Any” or all checkboxes are selected, that dimension contributes a multiplier of 1.0 (100%), meaning it has no effect on the result.
• Income data is adjusted for each country’s currency and cost of living. Income brackets reflect local purchasing power.
• Height data is converted to country-appropriate units where applicable.
• Race/ethnicity categories use each country’s official census terminology to accurately reflect how populations are measured locally.

Data is sourced from the most recent publicly available statistics as of early 2026.