The accounting firm of Deloitte & Touche is the largest international accounting firm in the world as ranked by total revenues. For two recent years, Deloitte & Touche reported the following for its U.S. operations:

........................................................................................Current Year.......Previous Year

Revenue (in billions)......................................................$16.1.....................$14.9

Number of professional staff (including partners)...58,585.....................53,592

a. For the current and previous years, determine the revenue per professional staff.

b. Interpret the trend between the two years.