Sales of Blu-ray titles passed the 9-million mark during the week ending March 16, HMR Research said Thursday. The San Francisco-based research firm said that from the high-definition format's launch in mid-2006 to the first of the year, Blu-ray sales totaled 6 million units but added 3 million more during the first 11 weeks of this year alone. Recent sales have been propelled by strong demand for Oscar-winning movie No Country for Old Men, which sold 68,000 copies in its first week, making it the top seller of the year in its initial week. Sales were also boosted by the official demise in February of the competing HD DVD format.