Distribution of the additional total proper motions (Δμ) and their significance (Δμ/σ_μ) caused by secular aberration drift due to the change in the line of sight for Galactic stars with a total proper motion exceeding 1 mas yr⁻¹. (a) Scatter plot of Δμ versus Δμ/σ_μ. The ten sources with the greatest additional proper motion are highlighted, with their names labeled near the data points. (b) Histogram of Δμ. (c) Histogram of Δμ/σ_μ.