Radial (left) and tangential (right) components of the cloudlet proper motions (Fig. 1). The least square fits to the points and the correlation coefficients and their significance levels are displayed. Three fits are shown for the radial velocity components to verify significance of correlation when the outermost cloudlets are excluded (for clarity, each fit is presented only for the given range of considered data and vertical lines mark the radius ranges): (1) all the data points, (2) the most blue-shifted cloudlet is excluded, (3) cloudlets at radius below 150 mas only.