All of the 470 senior executives at the Department of Veterans Affairs received annual ratings over the last four years indicating that they were “fully successful” in their jobs or even better, according to data released at a congressional hearing on Friday, despite delays in processing disability compensation claims and problems with veterans’ access to the department’s sprawling health care system.

None of the department’s senior executives received either of the two lowest of five possible job ratings, “minimally satisfactory” or “unsatisfactory,” in any of the past four fiscal years.

The data also showed that in 2013, nearly 80 percent of the senior executives were rated either “outstanding” or as having exceeded “fully successful” in their job performance, and that at least 65 percent of the executives received performance awards, which averaged around $9,000. Only about 20 percent received the middle of the five ratings.

Veterans Affairs officials sought to play down the data, saying that only 15 senior executives across the entire federal government had received either of the two lowest ratings in the most recent year — suggesting that the high ratings enjoyed by V.A. officials were not out of line with those of their counterparts at other government agencies.