The expressions below are for effects on age-specific fertility rates
(ages 15-19, .
patients reported identified through pregnant SARS in scientific informal sources Country patients * literature ([dagger]) ([double dagger]) China 84 ([section]) 5 0 Taiwan 6 0 2 Hong Kong 17 12 0 Singapore 5 0 4 Vietnam 1 0 1 Canada 4 ([section]) 1 0 All other 2 ([section]) 2 ([paragraph]) 0 Total 119 20 7 * National estimate equal 3/4 of the sum over all 5-y age groups of the product of the number of female patients in the 5-y age group by the age-specific fertility rate
for that age group.
Figure 1 presents B-W estimates based on the coefficients in their 1979 paper, and the updated original B-W data contained in appendix Table A2, plotted together with actual age-specific fertility rates
It holds age-specific fertility rates
(ASFRs) constant at their 2004 levels to ascertain the contribution to birth numbers in 2005 coming from either the size of the cohort of women at each age, or from their ASFR.
TFR is a synthetic measure of the average number of children a woman would expect to bear during her lifetime if she were to experience the exact age-specific fertility rates
throughout her life time.
For comparison, trends in female age-specific fertility rates
are shown in Figure 8.
It is perfectly proper to say that the age-specific fertility rates
of the immigrant populations are the same as those of the native population.
The TFR is the sum of age-specific fertility rates
(ASFRs), and as such represents the number of babies each woman would have if she were to experience all the ASFRs of that year.
A uni-modal distribution of age-specific fertility rates
considerably slimmed as a consequence of the fertility decline in younger and older ages of the female reproductive period.
Age-specific fertility rates
were not available for earlier years, and approximate estimates were made.
The total fertility rate is the number of births the average woman would expect to have over her lifetime if prevailing age-specific fertility rates
were to be maintained indefinitely Table 2--Construction of population projections from fertility, mortality, and migration variants Variant Fertility Mortality Migration Base Base Base Base Low fertility Alternative Base Base Low mortality Base Alternative Base Low migration Base Base Alternative Table 3--Symbols for variables used in the model N Population in natural units L Labour force in equivalent worker units (refer to Section 2.