==Spanish election table== 
 OK, first the bad news: I don't know of any way to have a sortable wikitable which works correctly and uses colspan at all. 

 Now, the better news: everything else is possible!  I've added some examples to the table below.  To set identical widths, you should specify these for the headers, either as a value or as a percentage.  I've used width=100 as an example for the second and third columns.  You can change almost any aspect of the cell's appearance; I've used wiki markup for a subtle effect for the header of column six, and a red background for something unmissable but a little difficult to read for the header of column seven.  Finally, the quickest way I know of to right-align your values is to add align="right" to the row header.  I've done this for the first row of values, then set the electoral district field to align left.  All this is as an example, but I hope some of it is useful to you.  You can find more details at Help:Table and Help:Sorting, and I'll be happy to answer any further queries.  ''  

 {|class="wikitable sortable" 
 |- 
 !Electoral District 
 ! width=100 | PSOE-04  
 ! width=100 | PP-2004 !! PSOE-08 !! PP-2008 
 ! PSOE-change'' 
 ! style="background:red" | PP-change 
 |- align="right" 
 |align="left"| Alicante 
 | 42.1 || 48.9 || 41.0  || 52.6 || -1.1 || +3.7  
 |- 
 |  Almería || 47.7  || 44.3  || 41.2  || 51.7 ||  -6.5 || +7.4  
 |- 
 |}