From Table 1 it is clearly evident that the crude birth rate as reported from yearly repeated surveys (PGE, PGS and PDS series), show erratic up and down movements over the years 1962-65 through 1988, with the level of the rate remaining over 40 [Farooqui and Farooq (1971); Government of Pakistan (1973, 1973a, 1974, 1974a, 1981, 1983, 1983a, 1984, 1984a, 1990)].
Among the other three sets the one where proportion in 0-4 years from 1979 PGS age distribution was used for 1984 and 1988, yielded the lowest values of the crude birth rates.
1574 Table 6 Comparative View of Reported and Indirectly Estimated Crude Birth Rates for 1984 PDS and 1988 PDS, using Proportions in Ages 0-4 Years, from the Respective Surveys, from 1981 Census, from Labour Force Surveys, and from 1979 PGS, Substituting for [sub.
ADJUSTMENT OF CRUDE BIRTH RATES FROM PDS 1984 TO 1988
Keeping in view the observed consistency between the levels and trends of infant mortality risks with that of child mortality risks over the period 1962-65 till 1979, and that the reverse survival ratios (used) were based on these risks it seems logical that the indirect estimates of the crude birth rates (provided in Table 3) must be consistent with child mortality risks.
Therefore, one of the factors contributing to the sudden rise in the indirectly estimated crude birth rates for the years 1984 through 1988 was the elevated infant mortality risks.
Crude birth rates (CBRs) and age-specific fertility rates obtained from the selected four surveys are presented in Table 1 and Table 2.
Crude birth rates are shown in Table 1 to show the progressive decrease which is consistent with the small decline in the Total Fertility Rates.
Such a change may have brought down the Crude Birth Rate and fertility levels in Pakistan.
Crude Birth Rate (CBR) is the most basic but important component of population change.
20 Table 3 The Estimates of Crude Birth Rates of 1961, 1972, 1981 and 1998 Censuses Census CBR 1961 42.