The mortality tables provide a baseline for the cost of insurance, but the health and family history of the individual applicant is also taken into account (except in the case of Group policies). This investigation and resulting evaluation is termed underwriting. Health and lifestyle questions are asked, with certain responses possibly meriting further investigation. Specific factors that may be considered by underwriters include:   Based on the above and additional factors, applicants will be placed into one of several classes of health ratings which will determine the premium paid in exchange for insurance at that particular carrier. Life insurance companies in the United States support the Medical Information Bureau (MIB), which is a clearing house of information on persons who have applied for life insurance with participating companies in the last seven years. As part of the application, the insurer often requires the applicant's permission to obtain information from their physicians. Automated Life Underwriting is a technology solution which is designed to perform all or some of the screening functions traditionally completed by underwriters, and thus seeks to reduce the work effort, time and/or data necessary to underwrite a life insurance application. These systems allow point of sale distribution and can shorten the time frame for issuance from weeks or even months to hours or minutes, depending on the amount of insurance being purchased. The mortality of underwritten persons rises much more quickly than the general population. At the end of 10 years, the mortality of that 25-year-old, non-smoking male is 0.66/1000/year. Consequently, in a group of one thousand 25-year-old males with a $100,000 policy, all of average health, a life insurance company would have to collect approximately $50 a year from each participant to cover the relatively few expected claims. (0.35 to 0.66 expected deaths in each year × $100,000 payout per death = $35 per policy.) Other costs, such as administrative and sales expenses, also need to be considered when setting the premiums. A 10-year policy for a 25-year-old non-smoking male with preferred medical history may get offers as low as $90 per year for a $100,000 policy in the competitive US life insurance market. Most of the revenue received by insurance companies consists of premiums, but revenue from investing the premiums forms an important source of profit for most life insurance companies. Group Insurance policies are an exception to this. In the United States, life insurance companies are never legally required to provide coverage to everyone, with the exception of Civil Rights Act compliance requirements.