Edit in JSFiddle

<table>
	<caption><strong>Lihtne tabel</strong></caption>
	<tr>
		<td>1</td>
		<td>2</td>
	</tr>
	<tr>
		<td>2</td>
		<td>3</td>
	</tr>
</table>

<br />

<table>
	<caption><strong>Keeruline tabel</strong></caption>
	<thead>
	<tr>
		<th></th>
		<th>August</th>
		<th>September</th>
		<th>Oktoober</th>
	</tr>
	</thead>
	<tbody>
		<tr>
			<th>Porfellijääk</th>
			<td>7 000 000</td>
			<td>8 000 000</td>
			<td>10 000 000</td>
		</tr>
		<tr>
			<th>Investeeringud ja laenud</th>
			<td>900 000</td>
			<td>800 000</td>
			<td>1 000 000</td>			
		</tr>

	</tbody>
	<tfoot>
		<tr>
			<th>Kokku 2016</th>
			<td>7 900 000</td>
			<td>8 800 000</td>
			<td>11 000 000</td>
		</tr>
	</tfoot>
</table>
table, tr, th, td{
    border: 1px solid black;
    padding: 10px;
}

table{
    width: 100%;
}