Long-run GDP and population time series for one country
Returns the full Maddison Project Database time series for one country: GDP per capita in 2011 international dollars (PPP) and population in thousands of people, one row per year from the country's earliest observation to 2022. Country-year cells with no observation return null for both fields (the Maddison panel is 17.8% dense on average - some countries only have data from 1820 onwards, a few Western European cores reach back to year 1 AD). For regional aggregates use /regional; for the world aggregate use /world. Published under CC BY 4.0 by Bolt and van Zanden at the University of Groningen.
Path parameters
ISO 3166-1 alpha-3 country code. Case-insensitive; normalised to uppercase.
ISO 3166-1 alpha-3 country code. Case-insensitive; normalised to uppercase.
Query parameters
Inclusive start year (integer). Workbook range is 1 AD through 2022.
Inclusive start year (integer). Workbook range is 1 AD through 2022.
Inclusive end year (integer). Defaults to the latest year in the workbook (2022).
Inclusive end year (integer). Defaults to the latest year in the workbook (2022).
Response
Year-ordered observations with gdppc (2011 int$) and pop (thousands) plus country metadata.
Example response
{
"data": {
"iso3": "USA",
"country": "United States",
"region": "Western Offshoots",
"region_slug": "western-offshoots",
"observations": [
{
"year": 2022,
"gdppc": 61120.25,
"pop": 334805
}
],
"count": 775,
"start_year": 1820,
"end_year": 2022
},
"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": "sugra_crypto",
"attribution": "Short interest and Reg SHO daily short volume data is owned by and sourced from FINRA (Financial Industry Regulatory Authority).",
"fallback_chain": [
"sugra_crypto",
"sugra_finance"
]
}
}