Data for submission of "Evolution of dipole-dipole dynamics in cold ammonia collisions" Authors: Yao Chang1, Andr´e J.A. van Roij1, Stach Kuijpers1, Sven Herbers, Etienne F. Walraven1,Tijs Karman1∗∗, Sebastiaan Y.T. van de Meerakker1∗∗1Radboud University, Institute for Molecules and MaterialsHeijendaalseweg 135, 6525 AJ Nijmegen, the Netherlands∗∗To whom correspondence should be addressed;E-mail: basvdm@science.ru.nl, t.karman@science.ru.nl