In September 1999, a controversy arose when "New York Times" reporter Joel Brinkley stated that the advertisements had been paid for by Microsoft. Based on internal Independent Institute documents "provided to the New York Times by a Microsoft adversary associated with the computer industry who refused to be further identified", Brinkley wrote that Microsoft "has secretly served as the institute's largest outside financial benefactor in the last year." Independent Institute internal documents showed that Microsoft had contributed $203,217 in 1999, making it the single largest contributor. Brinkley calculated that Microsoft's contribution amounted to approximately 20% of the funds in 1999 from external sources, excluding $304,725 contributed by Theroux.