Analysis of fit residuals for the annual f[Ap > Apo] reconstructions shown in Figure 4b, in the same format as Figure 5. In all panels Xo is observed f[Ap > Apo] and Xp is predicted values. (a) For Xp = f[Ap > Apo] predicted using the available (f > 0.5) interplanetary Pα values using the regression in Figure 3b: the fitted green distribution giving upper and lower 1−σ points shown by the green vertical dot-dash lines. (b) For Xp = f[Ap > Apo] predicted using reconstructed interplanetary Pα values using the regression shown in Figure 3b: the fitted blue distribution giving upper and lower 1−σ points are shown by the blue vertical dot-dash lines. (c) For Xp = f[Ap > Apo] predicted using reconstructed Ap values shown in blue in Figure 4a, using the regression shown in Figure 2d: the fitted orange distribution giving upper and lower 1−σ points shown by the orange dot-dash lines.