we participate in a medicare health support pilot program through green ribbon health , or grh , a joint- venture company with pfizer health solutions inc . grh is designed to support medicare beneficiaries living with diabetes and/or congestive heart failure in central florida . grh uses disease management initiatives including evidence-based clinical guidelines , personal self-directed change strategies , and personal nurses to help participants navigate the health system . revenues under the contract with cms , which expires october 31 , 2008 unless terminated earlier , are subject to refund unless a savings target is met . to date , all revenues have been deferred until reliable estimates are determinable . our products marketed to commercial segment employers and members smart plans and other consumer products over the last several years , we have developed and offered various commercial products designed to provide options and choices to employers that are annually facing substantial premium increases driven by double-digit medical cost inflation . these smart plans , discussed more fully below , and other consumer offerings , which can be offered on either a fully-insured or aso basis , provided coverage to approximately 564700 members at december 31 , 2007 , representing approximately 16.4% ( 16.4 % ) of our total commercial medical membership as detailed below . smart plans and other consumer membership other commercial membership commercial medical membership .
what is the percentage of aso's members among the total commercial medical membership?
these products are often offered to employer groups as 201cbundles 201d , where the subscribers are offered various hmo and ppo options , with various employer contribution strategies as determined by the employer . paramount to our product strategy , we have developed a group of innovative consumer products , styled as 201csmart 201d products , that we believe will be a long-term solution for employers . we believe this new generation of products provides more ( 1 ) choices for the individual consumer , ( 2 ) transparency of provider costs , and ( 3 ) benefit designs that engage consumers in the costs and effectiveness of health care choices . innovative tools and technology are available to assist consumers with these decisions , including the trade-offs between higher premiums and point-of-service costs at the time consumers choose their plans , and to suggest ways in which the consumers can maximize their individual benefits at the point they use their plans . we believe that when consumers can make informed choices about the cost and effectiveness of their health care , a sustainable long term solution for employers can be realized . smart products , which accounted for approximately 55% ( 55 % ) of enrollment in all of our consumer-choice plans as of december 31 , 2007 , are only sold to employers who use humana as their sole health insurance carrier . some employers have selected other types of consumer-choice products , such as , ( 1 ) a product with a high deductible , ( 2 ) a catastrophic coverage plan , or ( 3 ) ones that offer a spending account option in conjunction with more traditional medical coverage or as a stand alone plan . unlike our smart products , these products , while valuable in helping employers deal with near-term cost increases by shifting costs to employees , are not considered by us to be long-term comprehensive solutions to the employers 2019 cost dilemma , although we view them as an important interim step . our commercial hmo products provide prepaid health insurance coverage to our members through a network of independent primary care physicians , specialty physicians , and other health care providers who .