---
title: "Read one complete public population-reference series"
method: GET
path: "/api/v1/event-rates/reference"
---

# Read one complete public population-reference series

`GET /api/v1/event-rates/reference`

## Request

- Base URL: `https://probable.media`
- URL: `https://probable.media/api/v1/event-rates/reference`
- Auth: none declared

Returns the exact NHTSA, BLS, or CDC reference selected by id, including every published point, latest descriptive comparison, sources, methodology, dimensions, limitations, and refresh policy. This evidence is public regardless of subscriber status.

## Query parameters

- `id` string, required

## Response `200`

One complete population reference

- PopulationReferenceCatalogItem: A published population rate or cohort series used descriptively and never pooled with editorial or count/exposure rates.
  - `id` string, required
  - `title` string, required
  - `publisher` string, required
  - `population` string, required
  - `countryCode` 'USA', required
  - `countryName` 'United States', required
  - `kind` 'cohort_survival' | 'mortality_rate' | 'road_fatality_rate', required
  - `unit` string, required
  - `methodology` string, required
  - `dimensions` object, required
  - `points` object[], required
    - `year` integer, required
    - `value` number, required
    - `numerator` number
    - `denominator` number
    - `cohortYear` integer
    - `provisional` boolean
  - `sources` object[], required
  - `limitations` string, required
  - `refreshPolicy` 'source_release_import', required
  - `latest` object, required
    - `year` integer, required
    - `value` number, required
    - `numerator` number
    - `denominator` number
    - `cohortYear` integer
    - `provisional` boolean
  - `comparison` object, nullable, required
    - `priorYear` integer, required
    - `priorValue` number, required
    - `change` number, required
    - `relativeChange` number, nullable, required
    - `interpretation` string, required: Descriptive source-period difference, not a significance test or forecast.
  - `newsContribution` 0, required
  - `editorialContribution` 0, required
  - `comparableAcrossReferences` false, required

## Other responses

- `400`: Missing id
- `404`: Unknown population reference id

---

[API](https://skmtc.dev/probable/apis/probable-public-api.md) · [All operations](https://skmtc.dev/probable/apis/probable-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/probable/apis/probable-public-api/revisions/28e1acd459f3?raw)