What pushes those percentages higher when measured against Rowlett's growth rate is that Rowlett fell to 0.70%, less than 1%. Therefore, when measuring Rowlett's rate of growth of .7% against the much stronger rates of other towns of 5.1%, 8.9%, 10.9%, and 24.1%, the resulting number becomes larger. When it is said Rockwall's rate of growth, when measured against it's own population, is 7 times larger than Rowlett's, it is an accurate statement. From 2009 to 2012, Rockwall's rate of growth as a percentage of it's own population (5.1), when measured against Rowlett's identical criteria (0.7), is exactly 7.28 times.........not 5.1. The math problem (hiccup) was that Rowletts's growth rate fell below 1%.
The above is by no means an excuse for my periodically hitting the wrong button, not understanding higher math problems, or too cheap to buy a new calculator when needed. It is strictly how the arithmetic worked in this case. That doesn't resolve me from any other crimes against arithmetic.