Germany has a universal multi-payer system with two main types of health insurance: law enforced health insurance (or public health insurance ) ( Gesetzliche Krankenversicherung (GKV) ) and private insurance ( Private Krankenversicherung (PKV) ). Both systems struggle with the increasing cost of medical treatment and the changing demography. About % of the persons with health insurance are members of the public system, while % are covered by private insurance (as of 2006).  There are many differences between the public health insurance and private insurance. In general the benefits and costs in the private insurance are better for young people without family. There are hard salary requirements to join the private insurance because it is getting more expensive advanced in years.