Provides files to download data as it existed for this dataset on previous dates.

Statistics are most often revised for 1 of 2 reasons:

  1. For certain statistics initial estimates are released with the expectation that these may be revised and updated as further data becomes available.
  2. Revisions may also be made when methods or systems are changed.

These types of planned revisions should not be confused with errors in released statistics, which are genuine mistakes. Such mistakes occur rarely and, when they do happen, corrections are made in a timely manner, announced and clearly explained to users in line with the Code of Practice for Official Statistics (Principle 2, Practice 7).

Latest version

xls (291.8 kB)

Previous versions

Superseded files Reason for update Date superseded
xls (262.7 kB)
Correction See correction
The titles for the “January to December 2012 to 2018” reference tables have been updated to better clarify their content.
9 August 2019 12:07

Important notes and usage information

Lower and Upper CI's are provided at a 95% confidence level.