From today's RAAus email:
Reported data for 2014 year to date (January through October)
Hours flown
Jabiru 41,834
Rotax 71,626
All 131,227
Landings
Jabiru 92,735
Rotax 145,638
All 260,383
Engine failures (full or partial)
Jabiru 28
Rotax 16
All 51
That makes Jabiru 0.67 per thousand hours, Rotax 0.22 and others 0.39.
Jabs way in front, if the stats are complete (which they may not be, based on track record). Even if they aren't, it's a wide margin.