table {border-collapse:collapse;}
 table,th,td {border:1px solid black;}
 th {padding:2px;min-width:25px;background-color: gainsboro;}
 table.nbrs td+td  {text-align:right}
 table.codes row {text-align:center}
 table.codes td+td {text-align:center}
 table.codes td {text-align:left}