One 6 and nine 0's.
D000293:Adolescent; D000367:Age Factors; D003226:Congresses as Topic; D003710:Demography; D007390:International Agencies; D009934:Organization and Administration; D009938:Organizations; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics; D011158:Population Growth; D012106:Research; D014480:United Nations
Age Factors; Conferences And Congresses; Demographic Factors; International Agencies; Organization And Administration; Organizations; Population; Population Characteristics; Population Dynamics; Population Growth; Programs; Summary Report; Un; Youth