Comoving expansion rate, r_dH(z)/(1 + z), measured with BAO, with r_d in units of 147.3 Mpc. The red square is the present measurement at z = 2.33. Also shown are measurements using the Lyα-quasar cross correlation at z = 2.36 (Font-Ribera et al. 2014), and galaxy correlations at 0.35 <z< 0.65 (Alam et al. 2016), at z = 0.15 (Ross et al. 2015), and at z = 0.11 (Beutler et al. 2011). The points at z = 0.11 and z = 0.15 use the SNIa measurement of q₀ (Betoule et al. 2014) to convert the measured to D_H(z). The black line is the prediction of the Planck flat ΛCDM model (Table 1).