Not surprised that 10% of seats have been used.. Take the Lightning.. More than 10% of airframes were lost.. Cannot find actual numbers but it could have been as high as 25% plus.. RAF Jaguars.. 208 airframes brought and 65 lost in accidents.. Not all aircrew ejected but over half did.. The seats get used as its the last chance that Pilots have of escaping from machines that are unforgiving to errors in judgement and circumstance in the enviroment they operate in, especially low level..