It concluded that while in the United States, I.T. job growth is expected to average between 1.1 and 2.7 percent through 2010, the growth in cloud-sector jobs will be much swifter. The U.S. accounted for 62 percent of public IT cloud service spending last year compared to 35 percent of worldwide total IT spending. IDC concluded training and certification are key to providing the needed personnel and Microsoft used the opportunity to toot its own horn about the Microsoft Virtual Academy launched in April and for certifications that it says have been redesigned for the cloud.