n="center">1977</td>
<td align="left"><span class="flagicon"><a href="//en.wikipedia.org/wiki/Bulgaria" title="Bulgaria"><img alt="Bulgaria" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9a/Flag_of_Bulgaria.svg/23px-Flag_of_Bulgaria.svg.png" width="23" height="14" class="thumbborder" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9a/Flag_of_Bulgaria.svg/35px-Flag_of_Bulgaria.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9a/Flag_of_Bulgaria.svg/46px-Flag_of_Bulgaria.svg.png