Our rotation laws with two (red) or three (purple) parameters for the full latitude range in comparison to a study of the rotation rate of the quiet Sun (dashed) by Snodgrass (1984), magnetic features and cell movement (dash-dotted) by Hathaway & Rightmire (2011), and a study of all sunspots classes (dotted) by Balthasar et al. (1986). Additionally, data derived from helioseismology studies of the internal solar rotation rates (pluses) by Schou et al. (2002) has been added. The parameters of each mentioned study together with additional studies are given in Table A.1. The gray box shows the part of the plot previously shown in Fig. 3. The uncertainties of the two- and three-parameter laws were estimated using a Monte-Carlo analysis.