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. Author manuscript; available in PMC: 2014 Mar 18.
Published in final edited form as: Popul Dev Rev. 2012 Jun 27;38(2):221–236. doi: 10.1111/j.1728-4457.2012.00490.x

TABLE 1.

Sources of change in the mean age of the population, more developed (MDCs) and less developed (LDCs) countries, 2005–10

Region Mean age
Contribution of factor to rate of change
2005 2010 Rate of change, annualized Inter-cohort growth rate in births Inter-cohort cumulative change in mortality Inter-cohort cumulative change in net migration
MDCs 39.61 40.49 0.176 0.041 0.145 −0.010
LDCs 28.46 29.51 0.209 0.102 0.107 —

SOURCES: United Nations (2011); Human Mortality Database (2011). Additional data listed in the Appendix.