How to make design for table to be first column 3 rows and second colu

Question

I work on template using html and css . i face issue i work on design table template using html and css 

on first column have 3 rows and second column 2 rows 

so in second columns i can't design html second column to be 2 rows only 

so can you help me please 

what i try 

      <table>
            <thead>
                <tr>
                    <th>
                        Performance Rating for
                        last two years
                    </th>
                    <th>Disciplinary letters (in last two years)</th>
                </tr>
            </thead>
            <tbody>
                <tr> <th>Year</th> <th></th> <th></th> </tr>
                <tr> <th>Year</th> <th></th>  <th></th> </tr>


            </tbody>
        </table>

 

web design for table below