This plot visualizes the monthly statistics of certified ABs.
In contrast to the '<a href=trend_report_AB_ALL_HC.html>AB_processing</a>' 
plots it collects real ABs, as they appear on the AB monitor.

Collected are: <br>
- <b>the number of all certified ABs</b> (successfully executed and scoring green or red) <br>
(before XXLight: successful CAL+SCI; with XXLight: successful CAL).
</font><p><font size="2">

The AB numbers refer to <b>real ABs</b> and are lower by a factor MEF_FACTOR
(for MEF instruments)
than the number of det.ABs as counted on the <a href=trend_report_AB_ALL_HC.html>AB_processing</a> pages.
The numbers here measure the interactive and configuration 
workload (e.g. the number of ABs to score, certify and associate).</font><p><font size="2">

The history before 2004-01 is not well explored and likely to be incomplete.
The change of the operational model to the current 'XXLight' is marked. </font><p><font size="2">

<b>Note:</b> The latest data point in the current plot usually refers to a month which is not yet finished.
Its value will therefore continue to increase until a new last month starts.