with respect to our business operations , we are standardizing certain core business processes , primarily through our execution of the state street lean methodology , and driving automation of these business processes . we are currently creating a new technology platform , including transferring certain core software applications to a private cloud , and have expanded our use of service providers associated with components of our technology infrastructure and application maintenance and support . we expect the transfer of core software applications to a private cloud to occur primarily in 2013 and 2014 . to implement this program , we expect to incur aggregate pre-tax restructuring charges of approximately $ 400 million to $ 450 million over the four-year period ending december 31 , 2014 . to date , we have recorded aggregate restructuring charges of $ 289 million in our consolidated statement of income , composed of $ 156 million in 2010 and $ 133 million in 2011 . the following table presents the charges by type of cost : ( in millions ) employee-related real estate consolidation information technology costs total .
what is the approximate total number of workforce before the restructuring program?
the employee-related costs included costs related to severance , benefits and outplacement services . real estate consolidation costs resulted from actions taken to reduce our occupancy costs through consolidation of leases and properties . information technology costs included transition fees related to the above-described expansion of our use of service providers . in 2010 , in connection with the program , we initiated the involuntary termination of 1400 employees , or approximately 5% ( 5 % ) of our global workforce , which was substantially complete at the end of 2011 . in addition , in the third quarter of 2011 , in connection with the expansion of our use of service providers associated with our information technology infrastructure and application maintenance and support , we identified 530 employees who will be provided with severance and outplacement services as their roles are eliminated . as of december 31 , 2011 , in connection with the planned aggregate staff reductions of 1930 employees described above , 1332 employees had been involuntarily terminated and left state street , including 782 employees in 2011 . in connection with our continued implementation of the business operations and information technology transformation program , we achieved approximately $ 86 million of annual pre-tax , run-rate expense savings in 2011 compared to 2010 run-rate expenses . excluding the expected aggregate restructuring charges of $ 400 million to $ 450 million described earlier , we expect the program to reduce our pre-tax expenses from operations , on an annualized basis , by approximately $ 575 million to $ 625 million by the end of 2014 compared to 2010 , with the full effect realized in 2015 . assuming all other things equal , we expect to achieve aggregate annual pre-tax expense savings of approximately $ 540 million by the end of 2014 , for a total annual pre-tax expense savings of approximately $ 600 million to be realized in 2015 . we expect the business operations transformation component of the program to result in annual pre-tax expense savings of approximately $ 440 million in 2015 , with the majority of these savings expected to be achieved by the end of 2013 . in addition , we expect the information technology transformation component of the program to result in annual pre-tax expense savings of approximately $ 160 million in 2015 . these annual pre-tax run-rate savings relate only to the business operations and information technology transformation program . our actual operating expenses may increase or decrease as a result of other factors . the majority of the annualized savings will affect compensation and employee benefits expenses ; these savings will be modestly offset by increases in information systems and communications expenses as we implement the program . 2011 expense control measures during the fourth quarter of 2011 , in connection with expense control measures designed to calibrate our expenses to our outlook for our capital markets-facing businesses in 2012 , we took two actions . first , we .