Update from Friday, August 30, 2019
Users will notice that in the last few weeks the number of collections (called "studies" in the Microdata Library) has gone from 138 to 570! They also date back to 1881! These additional 432 studies are "placeholders" and haven't currently got any content. This allows us to add a link to all the collections in the collections calendar and then we will progressively either add what we have available, or for current/future collections, add material as it becomes available. Ideally questionnaires will get uploaded once they are finalised so users can get a better idea of what to expect when the collection is finished. A complete study contains background information and resources (including questionnaires), reports and microdata sets.
In the next few weeks all collections from 1999 until 2019 will be linked to a blank/populated study in the interactive Census and Survey Calendar (shown below).