Probability of persistent is now calculated to include very persistent. Reviewed-on: enviPath/enviPy#349 Co-authored-by: Liam Brydon <lbry121@aucklanduni.ac.nz> Co-committed-by: Liam Brydon <lbry121@aucklanduni.ac.nz>
Co-authored-by: Tim Lorsbach <tim@lorsba.ch> Reviewed-on: enviPath/enviPy#332