This site, provided for the University of Michigan, is no longer maintained - last update was at the end of July 2020 - and should be considered archived. Statistics from Michigan are now available in a new COUNTER Release 5 IRUS service. Other US institutions are welcome to join this new IRUS service.
This table shows, for each item type across all repositories where DOIs are available in the metadata that we harvest, the numbers of items of that type downloaded from repositories since joining IRUS-US and for each item type, the numbers and percentages that have DOIs available.
ItemType | Items | DOIs | % with DOIs |
---|---|---|---|
Article | 16,528 | 13,542 | 81.9 |
Audio | 189 | 4 | 2.1 |
Book | 190 | 12 | 6.3 |
Book Section | 628 | 314 | 50.0 |
Conference Papers/Posters | 376 | 9 | 2.4 |
Conference Proceedings | 2 | 1 | 50.0 |
Dataset | 153 | 2 | 1.3 |
Image | 553 | 2 | 0.4 |
Moving Image | 659 | 1 | 0.2 |
Music/Musical Composition | 10 | 1 | 10.0 |
Other | 1,436 | 55 | 3.8 |
Preprint | 97 | 5 | 5.2 |
Report | 2,819 | 83 | 2.9 |
Text | 201 | 6 | 3.0 |
Thesis or Dissertation | 3,210 | 1 | 0.0 |
Unknown | 71,522 | 43,669 | 61.1 |
Working Paper | 2,029 | 23 | 1.1 |