{"id":"Years of validity","title":"Years of validity","url":"https://bdl.stat.gov.pl/api/v1/years","provider":"Główny Urząd Statystyczny","dateModified":"2026-05-14T00:00:00","description":"Years of validity for which data may exist, e.g. '2003', '2004'.","keywords":"years","language":"pl, en","contentType":"application/json, application/xml"}