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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 2.

Sources of change in the proportion of the population above certain ages, more developed (MDCs) and less developed (LDCs) countries, 2005–10

Region Age threshold (x) Proportion x+
Rate of change in proportion x+, annualized Contribution of factor to rate of change
2005 2010 Inter-cohort growth rate in births Inter-cohort cumulative change in mortality Inter-cohort cumulative change in net migration
MDCs 65 0.157 0.166 0.012 0.001 0.015 −0.004
70 0.111 0.119 0.014 −0.002 0.019 −0.003
75 0.073 0.079 0.017 −0.004 0.024 −0.004
LDCs 65 0.055 0.058 0.012 0.004 0.007 —
70 0.034 0.036 0.017 0.003 0.014 —
75 0.018 0.020 0.024 0.002 0.021 —

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