$selected = 'selected';
    } else {
        $selected = '';
    }
    echo '<OPTION value="' . $i . '" ' . $selected . '>' . $i . '</OPTION>';
}
echo '</SELECT>';
echo '&nbsp;&nbsp;<input type="submit" name="show" value="OK"></form>';
echo "<table>\n\t\t<tr class='liste'>\n\t\t\t<th>Gesamt</th>\n\t\t\t<th>Anfänger</th>\n\t\t\t<th>Dropout</th>\n\t\t\t<th>%</th>\n\t\t</tr>\n";
$stsem_obj = new studiensemester();
$stsem_obj->getAll();
foreach ($stsem_obj->studiensemester as $row_stsem) {
    $statistik = new statistik();
    echo '<tr>';
    echo '<td>' . $row_stsem->studiensemester_kurzbz . '</td>';
    $statistik->get_prestudenten($studiengang_kz, $row_stsem->studiensemester_kurzbz, $ausbildungssemester);
    $anf = count($statistik->statistik_obj);
    echo '<td align="right">' . $anf . '</td>';
    $statistik->get_DropOut($studiengang_kz, $row_stsem->studiensemester_kurzbz, $ausbildungssemester);
    $dropout = count($statistik->statistik_obj);
    echo '<td align="right">' . $dropout . '</td>';
    if ($anf > 0) {
        $prozent = round(100 * $dropout / $anf, 2);
    } else {
        $prozent = '-';
    }
    echo '<td align="right">' . $prozent . ' %</td>';
    echo '</tr>';
}
echo '</tbody></table>';
echo '</body></html>';