I question whether we need four population-related columns.  "Current" population is necessary, and density is highly important, but having both 2010 and 2012 population is a bit extra, and including the percentage change is even more extraneous.  What if we reduced it to the version that I've placed at Talk:List of municipalities in Pennsylvania/shorter?  This reduces it by nearly 40KB — the difference is slightly exaggerated because the /shorter page is just the table, without the header and the stuff below the table, but this is a negligible difference.  When we have an extremely long page, reduction by 10% should be a big improvement, especially when we're just excising some rather extraneous elements.