Ok, so less than 5% reduced denials on 11% less requests...Sounds like statistically likely evidence that denials are more likely.
I don't mean to offend but this is an absurd usage of statistics. The entire problem with comparing the number of FOIA requests is that there is no inherent connection between the datasets. One year you could have 100 requests regarding factual information for NASA programs, the next you could have 100 requests for Dick Cheney's cell phone number. Obviously the statistics from the 2nd year would show an absurd increase in FOIA rejections, but that wouldn't actually mean the government was 'more closed' the second year.