<table class="freq table table-hover table-striped">
    <thead>
        <tr>
            <td style="width:22%" rowspan="2"><b>Metric</b></td>
            <td style="width:39%" colspan="3"><b>Count</b></td>
            <td style="width:39%" colspan="3"><b>Ratio</b></td>
        </tr>
        <tr>
            <td style="width:13%"><b>Input</b></td>
            <td style="width:13%"><b>Output</b></td>
            <td style="width:13%"><b>Diff</b></td>
            <td style="width:13%"><b>Input</b></td>
      