No stats but if you live on the Texas Gulf Coast where we produce 30% of the chemicals in the United States you would know this happens all the time. Several small ones (like this is) a year and a big one every 2-3 years, well that might have dropped since Charter sold out.
From a Centex native....Freeport and Texas City are almost always on fire. And they always smell funny. There's yer statistic.