Is this an improvement?

Used to see 1-3 roaches per day between early morning and late night. After 3 applications of Alpine spraying every week I see one roach about every 3 days or so.

I saw one on the kitchen counter this morning and was just really bummed out because this was the first one I've seen on a food prep surface since the first Alpine spray. It made me wonder if there is actual improvement here or that the difference in sightings isn't significant enough to be called an improvement?