But much like the presidential votes determined by the US House (which appeared in your list of really close elections), when it's such a small number of voters it's more likely to be single digit margin of victory. Statistics would also make it likely with enough small elections, that resulted in a narrow or tied election there would a close to 50-50 break out, but only if there were thousands of instances. Most smaller elections are lopsided making the number of instances to occur take hundreds of years to see the result of near even outcomes. It's likely there will be drastic changes in partisan make up or demographic shifts or even electoral reform that would avoid the enough occurrences to have that result.