You can create space between table rows by adding an empty row of cells like this...
<tr><td></td><td></td></tr>
CSS can then be used to target the empty cells like this…
table :empty{border:none; height:10px;}
NB: This technique is only good if none of your normal cells will be empty/vacant.
Even a non-breaking space will do to avoid a cell from being targetted by the CSS rule above.
Needless to mention that you can adjust the space's height to whatever you like with the height property included.