I've made a discovery further to this. If you take a look at 453779c39fd0d3f0742eb80e0cb2a7c7.txt, which I'm sure most people have seen before, you'll notice that the last SS value is injury free. All the other SS ones are in the editor already but injury free isn't...
Incidentally Nyanga has injury free rating 02. They seem to be scaled from 0-3 which doesn't make sense with a binary value but there we go.