Looks like numbers are increasing?
From the related documents section at http://www.actuaries.org.uk/studying/exam-results
September 2015 - 87 out of 172 passed
April 2015 - ? (couldn't find it on the site)
September 2014 - 65 out of 150 passed
April 2014 - 61 out of 149 passed
September 2013 - 68 out of 164 passed
April 2013 - 68 out of 148 passed
September 2012 - 60 out of 127 passed
April 2012 - 59 out of 132
September 2011 - 42 out of 107 passed
April 2011 - 37 out of 102 passed