The PMI Project Management Fact Book â€” Second Edition is destined to be a benchmark resource for both the project management community and those interested in learning more about the profession. High school and college students, in particular, will find it to be an invaluable overview of a career that can offer excellent salaries and challenging opportunities around the world. Here are just a few of the fascinating facts youâ€™ll discover about the project management profession: -More than sixteen and one-half million people canâ€™t be wrong. The Project Management Institute (PMIÂ®) estimates that four-and-a half million people in the United Statesâ€”representing about 3.3 percent of the employed U.S. workforceâ€”may regard project management as their profession of choice. The size of the profession in the rest of the world may be more than 12 million. -Projects are big business. PMI estimates that the U.S. public and private sectors spend some US$2.3 trillion on projects every year, an amount equivalent to one-quarter of the nationâ€™s gross domestic product. Extrapolating U.S. data, PMI estimates that the world spends nearly US$10 trillion of the worldâ€™s US$40.7 trillion gross product on projects of all kinds. -The project management profession is experiencing explosive growth. Memberhip in (PMI) has grown to more than 95,000 members. In addition, more than 46,000 individuals are now certified as Project Management Professionals (PMPÂ®).