Dependence of the percentage of hyperbolic orbits on the individual meteoroid stream and on the mean heliocentric speed of the stream for (a) the CAMS and (b) the GMN databases. The red line indicates a value of 42.1 km s⁻¹ of heliocentric speed, that is the mean value of the parabolic limit. The individual points representing meteoroid streams (and their corresponding meteor showers) are colour-coded based on the calculated value of the mean geocentric speed of the shower.