Call RT.AppendText( |<td data-value="| & Format(downtimeperc,"0.00") & |" nowrap>| & Format(downtimeperc,"0%") & |</td>|)
var downtimeperc = api.column( 6, {page:'current'}).nodes().reduce( function (a, b) { return a + intVal($(b).data('value')); }, 0 );