The CBO report also looked into the distribution of ratings, an issue that employee organizations have raised as part of their contention that ratings would be subject to various forms of bias. The report said the average rating in the 2007 ratings cycle for whites was 3.5, for blacks 3.3, and for other minority groups, 3.4. However, it said there was a stronger difference in ratings by pay level, with employees in higher levels of pay bands tending to get higher ratings. That "partly explains the differences among groups of employees" since the percentages of whites in the higher levels is greater than in the lower levels, CBO said. Men and women received the same average rating, and so did employees under age 40 versus age 40 and up. CBO said the more significant difference in payout actually was by DoD component, with Army employees getting an average 3.8 percent of salary base pay raise plus an average 2.1 percent bonus, with while employees of the Navy got 2.9 and 1.2 percent on average, respectively.