Fertility Objects

The increase in a population through birth is described by an object of type FERTILITY. The body of the object has three mandatory properties: Date, Population, and BuildMethod. Date specifies the date of the fertility readings. Population must be of the form CPOP/PPOP where PPOP is the parent populaton code and CPOP is the code for child. BuildMethod determines how a continuous fertility curve is built from a finite number of fertility data points. Fertility data is specified either in a FertilityRates or a Parameters subtable.

Age-Specific Fertility Rates

Fertility is specified by ASFRs specified in a FertilityRates subtable. There are two mandatory columns: Age and Rate. The Rate column specifies the ASFR in absolute units (not per 1000). The Age column specifies the age range for each rate. For all but the last rate the age range is from the age on the same row to the age on the next row. For the last rate the range is from the age on the same row to that age plus one. The is an optional Use column which specifies which rates will be used to build the curve. A positive Use value specifies that a rate should be used. A zero or negative value specifies that the rate should not be used.

Fertility
         
Handle AUS-F_ASFR_2011:2      
Name AUS-F_ASFR_2011      
TypeThe type of the object. Must be FERTILITY
 FERTILITY      
         
PopulationA string of the form 'CPOP/PPOP' where PPOP is the population of parent and CPOP is the population of the child.
 AUS/AUS-F      
DateThe date of the fertiltiy rates.
 20110630      
BuildMethodThe method used to build a complete fertility curve from a finite set of rates.
 HYBRID_FERT      
         
FertilityRatesThe FertilityRates subtable has three columns: Age, Rate, and [Use]
        
 
AgeThe start age for the fertility rate and the end age of the previous fertility rate. For the last entry the endage=startage+1.
RateFertility rate per person
UseA flag indicating whether the rate is used to build the fertility object. Use >0 means the rate is used. Use <= 0 means the rate is not used, but the age will still be used to determine the end age of the previous row.This column is optional. If not specified then defaults to 1 for all rows.
  
  15 0.0029 1  
  16 0.0066 1  
  17 0.0137 1  
  18 0.0224 1  
  19 0.0336 1  
  20 0.0413 1  
  21 0.0448 1  
  22 0.0514 1  
  23 0.059 1  
  24 0.068 1  
  25 0.0797 1  
  26 0.0906 1  
  27 0.1045 1  
  28 0.1157 1  
  29 0.125 1  
  30 0.1271 1  
  31 0.1347 1  
  32 0.1288 1  
  33 0.1216 1  
  34 0.1116 1  
  35 0.1004 1  
  36 0.0866 1  
  37 0.0702 1  
  38 0.0561 1  
  39 0.0425 1  
  40 0.0297 1  
  41 0.0203 1  
  42 0.0128 1  
  43 0.0073 1  
  44 0.0038 1  
  45 0.002 1  
  46 0.001 1  
  47 0.0005 1  
  48 0.0002 1  
  49 0.0005 1  
         

Parameters

For parametric buildmethods such as COALE_TRUSSELL a fertility object can be specified by listing the parameters in a Parameters subtable.