Cumulative posterior probability of the BNS successful jet incidence. The solid red (blue) line refers to the fraction f_j, GW of GW-detectable BNS mergers that produce a successful jet, based on having observed the single successful event GW170817 and adopting the Jeffreys (uniform) prior. The solid grey line refers to the jet incidence f_j, tot in the entire BNS merger population, based on the ratio of the local rate of short GRB jets R_0, SJ to the BNS rate R_0, BNS. The implied 90% credible lower limits are annotated.