Major Clients	12 Months Ended
Sep. 30, 2015
Major Clients
Major Clients	21. Major Clients Other than the U.S. federal government, no single client accounted for 10% or more of the Company's revenue in any of the past five fiscal years. Approximately 24%, 15% and 18% of the Company's revenue was derived through direct contracts with agencies of the U.S. federal government in the years ended September 30, 2015, 2014 and 2013, respectively. One of these contracts accounted for approximately 2%, 3% and 4% of the Company's revenue in the years ended September 30, 2015, 2014 and 2013, respectively.

21. Major Clients

Other than the U.S. federal government, no single client accounted for 10% or more of the Company's revenue in any of the past five fiscal years. Approximately 24%, 15% and 18% of the Company's revenue was derived through direct contracts with agencies of the U.S. federal government in the years ended September 30, 2015, 2014 and 2013, respectively. One of these contracts accounted for approximately 2%, 3% and 4% of the Company's revenue in the years ended September 30, 2015, 2014 and 2013, respectively.