gdp-per-capita-worldbank, maddison-data-gdp-per-capita-in-2011us (Maddison Project Database long-run series), gdp-per-capita-in-the-uk-since-1270, world-gdp-over-the-last-two-millennia, population, population-density, population-growth-rates, share-of-population-urban, happiness-cantril-ladder, mean-years-of-schooling. Published under CC BY 4.0 with dual attribution naming the upstream source (World Bank, Maddison Project, UN WPP, Gallup World Poll, Barro and Lee).x-api-key: ********************curl --location '/api/v1/owid/growth-population?slug=gdp-per-capita-worldbank&country=USA&start_year=2000&end_year=2023' \
--header 'x-api-key: <api-key>'{
"data": {
"slug": "string",
"theme": "string",
"value_column": "string",
"unit": "string",
"short_unit": "string",
"country": "string",
"start_year": 0,
"end_year": 0,
"observations": [
{
"country": "string",
"code": "string",
"year": 0,
"value": 0
}
],
"count": 0,
"metadata": {
"slug": "string",
"title": "string",
"subtitle": "string",
"owid_variable_id": 0,
"short_name": "string",
"unit": "string",
"short_unit": "string",
"type": "string",
"timespan": "string",
"last_updated": "string",
"last_updated_iso": "string",
"next_update": "string",
"original_chart_url": "string",
"full_metadata_url": "string"
},
"attribution": {
"licence": "CC BY 4.0",
"attribution": "string",
"source_name": "string",
"citation_short": "string",
"citation_long": "string"
}
},
"meta": {
"endpoint": "/api/v1/fred/us/cpi",
"data_time": "2026-04-16T14:30:00Z",
"response_time": "2026-04-16T14:30:12Z",
"provider": "Sugra API v1.0.1",
"source": "string",
"fallback_used": true,
"fallback_chain": [
"string"
],
"cached": true
}
}