HTML table width and height all visible

<!DOCTYPE html>
<html>
<head>
<style>
table, td, th {
    border: 1px solid black;
}
table {
    border-collapse: collapse;
    width: 100%;
}
th {
    height: 30px;
}
td {
    padding-left: 20px;
}
</style>
</head>
<body>

<h2>The width and height Properties</h2>
<p>Set the width of the table, and the height of the table header row:</p>

<table>
  <tr>
    <th>Firstname</th>
    <th>Lastname</th>
    <th>Savings</th>
  </tr>
  <tr>
    <td>Peter</td>
    <td>Griffin</td>
    <td>$100</td>
  </tr>
  <tr>
    <td>Lois</td>
    <td>Griffin</td>
    <td>$150</td>
  </tr>
  <tr>
    <td>Joe</td>
    <td>Swanson</td>
    <td>$300</td>
  </tr>
  <tr>
    <td>Cleveland</td>
    <td>Brown</td>
    <td>$250</td>
</tr>
</table>

</body>
</html>