When agency revenues start to fall year-over-year, there is usually a reason.  Sometimes the trend can be reversed, such as if it is tied to an economic cycle, but quite often the downward trend is unstoppable.  In our experience, a steady decline in the business is typically an indicator that one or more of the agency principals are spending less time running the business.  The enthusiasm and competitiveness that perhaps once drove growth in the business has waned.