PT PerformanceAccredited vs. Non-Accredited
Starting with the October 2003 Proficiency Testing Study, a failure summary for each study is available in .pdf format.
| Year | Study |
|---|---|
| 2010 | January | March | June | October |
| 2009 | January | March | June | October |
| 2008 | January | March | June | October |
| 2007 | January | March | June | October |
| 2006 | January | March | June | October |
| 2005 | January | March | June | October |
| 2004 | January | March | June | October |
| 2003 | October |