§ Mr. Fisher
To ask the Secretary of State for Northern Ireland which statistics his Department has discontinued(a) the collection and (b) the publication of since 1989. 
§ Sir John Wheeler
Changes in the basis of compilation, presentation and publication of statistical series are made from time to time in response to the requirements of the Government and international organisations for statistical information. Other changes reflect changes in administrative systems on which some series are based, the development of new statistical techniques are technological developments affecting the compilation and dissemination of statistical data.
When such changes are made, they are normally documented in the relevant statistical publications.