Rotation rate residuals, δΩ(r, θ, t)/2π, at r = 0.9, 0.95, and 0.99 R_⊙ for 1996-Jun.-06 to 2019-Jun.-30. The data is binned for each calendar year, and the colour scale is saturated at ±3 nHz. The vertical dashed grey lines denote the positions of the maxima of solar cycles 23 and 24 (2002 and 2014). The vertical dashed brown line indicates the minimum between the two cycles (2009).