Evolution of the volume number density Φ of the total, star-forming, and quiescent samples at fixed mass, showing only mass complete bins. 1σ uncertainties are indicated by the colored envelopes. Gray shaded regions indicate upper limits corresponding to Φ(N = 0) at each redshift bin. The lower panel shows the evolution of the fractional change in the volume number density at fixed mass, relative to z₀ ≡ 0.2 < z ≤ 0.5 of the total sample.