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 (1.1 MB)

Previous versions

Superseded files Reason for update Date superseded
xls (1.1 MB) Scheduled update/revision 30 November 2017 09:30
xls (1.1 MB) Scheduled update/revision 24 August 2017 13:03
xls (1.2 MB) Scheduled update/revision 24 August 2017 09:30
xls (1.8 MB) Scheduled update/revision 25 May 2017 09:30
xls (1.8 MB) Scheduled update/revision 23 February 2017 09:30
xls (1.8 MB) Scheduled update/revision 1 December 2016 09:30
xls (1.9 MB) Scheduled update/revision 25 August 2016 09:30
xls (1.9 MB) Scheduled update/revision 26 May 2016 09:30
xls (1.7 MB) Scheduled update/revision 25 February 2016 09:30

Important notes and usage information

This spreadsheet is updated quarterly. The spreadsheet always contains data for 40 rolling years. Each new release removes the oldest data and adds the latest available data. In addition, previously published estimates may be revised for the following reasons:

  1. Estimates based upon provisional data are revised when final data becomes available

  2. Revisions may also be made when methods or systems are improved

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).