Demographic changes as a problem for social security systems.
D017677:Age Distribution; D000367:Age Factors; D003710:Demography; D003858:Dependency, Psychological; D019049:Developed Countries; D004467:Economics; D005060:Europe; D005376:Financial Management; D005380:Financing, Government; D005860:Germany, West; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics; D012943:Social Security
Age Distribution--changes; Age Factors; Comparative Studies; Demographic Factors; Dependency Burden; Developed Countries; Economic Factors; Europe; Financial Activities; Financing, Government; Germany, Federal Republic Of; Microeconomic Factors; Population; Population Characteristics; Population Dynamics; Social Security; Western Europe