Anywho, here are the numbers on "open" ads compared with a few other hits.
1. This is for July to September for each year. I'll try for an update when October is through.
2. I'm doing this in between grading papers for midterms, so the cleaning of the data was fast. I'm confident in the "open" line, but not the others. Why? Because so many ads have detailed descriptions. I've added the others for fast and semi-reliable comparison.