within video games in the same manner as with racial minorities. However, LGBT developers have also come under the same type of harassment from external groups like women and racial minorities due to the nature of the video game culture. Age The industry also is recognized to have an ageism issue, discriminating against the hiring and retention of older developers. A 2016 IGDA survey found only 3% of developers were over 50 years old, while at least two-thirds were between 20 and 34; these numbers show a far lower average age compared to the U.S. national average of about 41.9 that same year. While discrimination by age in hiring practices is generally illegal, companies often target their oldest workers first during layoffs or other periods of reduction. Older developers with experience may find themselves too qualified for the types of positions that other game development companies seek given salaries and compensations offered. Contract workers Some of the larger video game developers and publishers have also engaged contract workers through agencies to help add manpower in game development in part to alleviate crunch time from employees. Contractors are brought on for a fixed period and generally work similar hours as full-time staff members, assisting across all areas of video game development, but as contractors, do not get any benefits such as paid time-off or health care from the employer; they also are typically not credited on games that they work on for this reason. The practice itself is legal and common in other engineering and technology areas, and generally it is expected that this is meant to lead into a full-time position, or otherwise the end of the contract. But more recently, its use in the video game industry has been compared to Microsoft's past use of "permatemp", contract workers that were continually renewed and treated for all purposes as employees but received no benefits. While Microsoft has waned from the practice, the video game industry has adapted it more frequently. Around 10% of the workforce in video games is estimated to be from contract labor. Unionization Similar to other tech industries, video game developers are typically not unionized. This is a result of the industry being driven more by creativity and innovation rather than production, the lack of distinction between management and employees in the white-collar area, and that the pace at which the industry moves that makes union actions