results,
but at the cost of eliminating real-time data.  This is because the
adjusted fields for real-time data are set to <code>NA</code> as a matter of policy (see
section 2.2.5 of reference 1).</p>
<p>Wider data coverage is obtained  if <code>fallback</code> is <code>TRUE</code>.  In this
case, the focus is shifted to adjusted data <em>only if</em> the data-mode for
the individual profiles is <code>A</code> or <code>D</code>, indicating either Adjusted or
Delayed mode. Any profiles that are of the <code>