Sorry Clem it was AP.
Per fact check.org
Al Qaeda
The President said twice that "75 percent" of al Qaeda leaders have been "brought to justice." But as The Associated Press reported Oct. 1, Bush was referring to the deaths or arrests of 75 percent of bin Laden's network at the time of the September 11 attacks -- not those who are running the terrorist organization today. The AP also reported that the CIA said earlier in the year two-thirds of those leaders are gone; at his acceptance speech in September, Bush increased his count to three-fourths based on unreleased intelligence data.
However,I'd expect you want more proof and after reading below you still won't believe.

--and by the way feel free to how us the last administration 8 year achievement in this area.
board of Directors for al-Qaeda
Mohammed Atef Supreme Military Commander Dead (November 2001) Hell
Abu Zubaydah Global Operations Chief Apprehended (April 2002) In Custody
Abu Jafar al-Jaziri Deputy Global Operations Chief Dead (April 2002) Hell
Abu Zubair al-Haili North African Operations Chief Apprehended (June 2002) In Custody
Tawfiq Attash Khallad Leader of USS Cole Operation, South Asian Operations Chief Apprehended (March 2003) In Custody
Abd al-Rahim al-Nashiri Middle East Operations Chief Apprehended (November 2002) In Custody
Tariq Anwar al-Sayyid Ahmad Balkans Operations Chief Dead (February 2002) Hell
Mohammed Salah Senior Explosive Expert, Central African Operations Chief Dead (December 2001) Hell
Yasser al-Jaziri Deputy Head of Explosives Training Apprehended (March 2003) In Custody
Haffan al-Hasham Deputy communications chief Apprehended (March 2003) In Custody
Muhammad Naeem Noor Khan aka Abu Talha Khan AQ Computer & Communications expert Apprehended (July 2004) In Custody
TERRORIST TRAINING CAMP COMMANDERS
Sheikh Ibn al-Liby (Ibn al-Shaykh al-Libi) Terrorist Training Camp Commander Apprehended (January 2002) In Custody
Abd al-Hadi al-Iraqi Terrorist Training Camp Commander Apprehended (April 2002) In Custody
Qari Saifullah Akhtar Terrorist Training Camp Commander Apprehended (August 2004) In Custody
Fathur Rahman al-Ghozi Terrorist Training Camp Commander Apprehended (December 2001) In Custody
THE FINANCIAL COMMITTEE
Sheikh Saiid al-Masri (Mustafa Ahmed al-Hisawi) Head of the Financial Committee Apprehended (March 2003) In Custody
Wan min Wan Mat Financier Apprehended (September 2002) In Custody
Abdul Rahim Riyadh Financier Apprehended (February 2002) In Custody
Abu Salah al-Yemeni Financier Dead (February 2002) Hell
Hamza al-Qatari Financier Dead (March 2002) Hell
Sheik Mohammed Al Hasan Al-Moayad Financier / Cleric Apprehended (January 2003) In Custody
Mohammed Mohsen Yahya Zayed Financier / Cleric Apprehended (January 2003) In Custody
Abu Yasir al-Jaziri Financier Apprehended (March 2003) In Custody