Fluxes at the epochs of the STIS 2001, COS 2011, COS 2013, and COS 2016 observations of NGC 3783 in the continuum at 1470 Å (black) and in the several components of the C IV emission line: the narrow component (cyan), the medium-broad component (green), the broad component (blue), and the very broad component (magenta). Fluxes are scaled as noted in the labels in the figure. The continuum points are connected by a thin black line. The open circle in the 2016 line shows the value of the continuum flux if we scale it down by the transmission of the obscurer at the epoch of the COS observations.