Method
Where the figures come from.
Syli Atlas relies first on the IMF World Economic Outlook, published in April and October. Other sources only fill gaps and are always labelled.
Every figure on the site names its source just below it. Syli Atlas is a non-commercial project: it uses each source within the terms below.
Sources
What each one provides, its terms and what is online
IMF · World Economic Outlook
GDP, growth, inflation, public debt, fiscal balance, current account, unemployment, population
- Updated
- April and October
- Online
- World Economic Outlook (October 2026)
S&P Global Ratings, Moody's, Fitch Ratings
Sovereign credit ratings
- Terms
- Read from each agency's release, linked under every rating; never scraped
- Updated
- At each decision
- Online
- 2026-11-10
World Bank, International Debt Statistics
External debt by creditor, including China, and its service
- Updated
- Every December
- Online
- 2026-11-05
World Bank, World Development Indicators
Investment, remittances and aid inflows, value added and jobs by sector (ILO estimates), poverty, electricity, internet, accounts
- Updated
- Several times a year
- Online
- 2026-10-08
CEPII, BACI
Exports and imports of goods by product and partner
- Updated
- Every year, in January
- Online
- version 202601, HS22
IMF · Debt sustainability analyses of low-income countries
Risk of external debt distress, with the date of each analysis
- Terms
- Public assessment, linked; not recomputed
- Updated
- Every quarter
- Online
- 2026-03-31
MansaAPI
Stock exchange closes and indices, dollar exchange rates
- Updated
- Every trading day
- Online
- 2026-11-11
ISO 4217 and central banks
Currency codes and fixed parities (CFA francs, Comorian franc, escudo, dobra…)
- Terms
- Public facts
- Updated
- When a parity changes
What Syli Atlas computes
These figures are calculations, not data from a source. The page says so where they appear, and names the series they come from.
- Real GDP index, chained from the IMF growth rates.
- Totals and averages of the regions and of Africa.
- UEMOA and CEMAC convergence criteria, checked against IMF figures. The IMF does not publish CEMAC's reference fiscal balance: that criterion is not computed.
- The common rating scale (AAA = 22, default = 1) and the rating verdicts.
Daily updates
Every morning a job asks the IMF whether a new edition is out. When one is, the figures are imported, checked, published, and every profile is recomputed. Pages stay in your browser for one day and remain readable offline.
How totals are computed
- GDP and population of regions and of Africa are sums of their countries.
- GDP per capita of a group is its total GDP divided by its population.
- Growth and inflation of a group are averages weighted by GDP in purchasing power parity.
- Public debt of a group is weighted by GDP in dollars.
- The fiscal balance and the current account of a group are weighted by GDP in dollars. Groups have no unemployment rate: the IMF covers too few African countries.
- A country missing a value for a year is left out of the group for that year, and the page says so.
How changes are computed
Real GDP is an index chained from the IMF growth rates, so it measures output volume without inflation or exchange rate effects. Levels change in percent; rates (growth, inflation, debt) change in percentage points.
Estimates and projections
Recent years are IMF estimates, and later years are projections. Charts show them dashed. They are revised at every edition.
Reuse
What Syli Atlas computes and writes (regional and community totals, ranks, changes over a period, answer sentences, charts and share images) is under the Creative Commons Attribution 4.0 licence (CC BY 4.0): you may copy, adapt and republish it, commercial use included, as long as you credit Syli Atlas with a link to the page. Read the licence
Source figures keep the terms of their source, listed above: cite the IMF, the World Bank, CEPII or the agency along with Syli Atlas. Stock prices are the exception: their source (MansaAPI) allows display on this site only, so they are not covered by this licence and may not be redistributed.
Example: « Source: Syli Atlas (CC BY 4.0), from IMF, World Economic Outlook (October 2026), https://syliatlas.com/en/countries/senegal ».
Every profile can be downloaded as CSV, and the JSON API is open: see the API page. Public API →