# Data Dictionary - Global Demographics & Ageing - dependency ratios, fertility & longevity, every country (World Bank, 7 indicators)

**Units:** vary by `indicator` - read the per-row `unit` column (overall: % / ratio / years).  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | Country (ISO3 code) |
| `ts` | timestamp (UTC) | Year |
| `indicator` | str | Old-age dependency / 65+ share / 0-14 share / total dependency |
| `value` | float | Ratio or % share |
| `unit` | str | Unit |
| `res_min` | int | Native resolution (annual) |

*Source: World Bank Open Data.*