Civometry calculation
International migration out per 1,000 residents by local authority
Estimated moves out of each UK local authority to outside the UK over the year to mid-year (ONS rebased back series MYEB3), per 1,000 usual residents of the same authority at that mid-year (same workbook).
How it is calculated
- Numerator
- International migration out by local authority, 2012 to 2024
- Denominator
- Population by local authority
- Formula
- numerator ÷ denominator × 1,000
- Result is measured in
- per 1,000 residents
- Which population is used
- same period
- Suppressed when
- the numerator is below 0 or the population below 1,000, so small numbers are not published as rates
What it covers
All 361 UK local authorities, years to mid-2012 through mid-2024 (the span of the rebased back series; later years have no rebased population level yet).
4,693 calculated values, most recently for Year to mid-2024.
What this calculation cannot tell you
- The denominator is the estimated population at the END of the year the flow covers (30 June), not the mid-interval average demographers use for a crude rate, so figures can differ slightly from any published crude rate.
- Both series are the ONS back series rebased to Census 2021 and deliberately differ from the estimates published for these years at the time.
- Rates are crude, not age-standardised - areas with different age structures are not directly comparable on this measure.
Check it yourself
Every calculated value stores the numerator, the denominator and the identifiers of the two official observations it came from. Open the numerator and denominator above, take the figures for the same period and category, and apply the formula. If you get a different answer, tell us where it diverges.