Catalogue of every available metric

A bare object keyed by group name, each value an array of metric definitions. This is the source of the variableCode values the other operations take.

The catalogue is complete regardless of tier: it lists paid metrics too, so a composite appears here even though ranking by it needs Pro. type is composite for the four composite indices and crime for the four municipality-level crime rates.

Example request: https://suomiatlas.com/api/v1/variables

What each group actually counts, when Statistics Finland withholds it, and the misreading it invites is documented at https://suomiatlas.com/en/metrics (Finnish: https://suomiatlas.com/mittarit). Read that before describing any figure from this API: hr_mtu is not a salary, and the income-category variables count people rather than euros.