Macau Business Daily – Macau could need as many as 7,000 new gaming machines each year until 2017 to cater for the next wave of Cotai casino openings, says a new report commissioned from Macau Polytechnic Institute. The document ‘Research Report on Macao Gaming Industry’ was launched at the Macao Gaming Summit conference held during the Macao Gaming Show last week. The 7,000 new-to-market estimate is likely to be a gross increase rather than a net increase. Underperforming machines regularly get pulled from the highly competitive Macau casino floors. The attrition rate last year was as high as 20 percent…