HTCC has released the passing rate (the percentage of people who passed the examination in a given year) for the CHT examination since 2002. Passing rates are as follows:
- 2002 - 53%
- 2003 - 57%
- 2004 - 51%
- Nov 2005 - 55%
- Jan 2006 retest - 38%
- 2006 - 53%
- 2007 - 57%
- 2008 - 54%
- May 2009 - 52%
- Nov 2009 - 61%
- May 2010 - 56%
- Nov 2010 - 57%
- May 2011 - 54%
- Nov 2011 - 52%
- May 2012 - 56%
- Nov 2012 - 58%
- May 2013 - 60%
- Nov 2013 - 62%
- May 2014 - 62%
- Nov 2014 - 55%
- May 2015 - 63%
- Nov 2015 - 61%
- May 2016 - 57%
- Nov 2016 - 60%
- May 2017 - 65%
- Nov 2017 - 58%
- May 2018 - 56%