═══════════════════════╤═══════════════════════════════════════════════ ORDER OF BIRTH. │ INFANT MORTALITY RATES, ACCORDING TO MOTHER’S │ AGE. ───────────────────────┼───────────────────────┬─────────────────────── │ Lowest mortality. │ Highest mortality. ───────────────────────┼───────────┬───────────┼───────────┬─────────── │ Mother’s │ Mortality │ Mother’s │ Mortality │ age. │ rate. │ age. │ rate. ───────────────────────┼───────────┼───────────┼───────────┼─────────── All children │ 20–24│ 140.0│ Under 17│ 367.3 ═══════════════════════╪═══════════╪═══════════╪═══════════╪═══════════ First child │ 25–29│ 92.1│ 17–19│ 190.4 Second child │ 25–29│ 100.3│ 17–19│ 178.6 Third child │ 30–39│ 106.4│ 25–29│ 160.8 Fourth child │ 30–39│ 122.4│ 20–24│ 155.0 Fifth child │ 30–39│ 105.8│ 25–29│ 236.6 Sixth child │ 30–39│ 164.8│ 25–29│ 171.4 ───────────────────────┴───────────┴───────────┴───────────┴─────────── The difference in size of family for native and foreign mothers of different ages are indicated in the next table. The total and average number of live-born children, not reportable pregnancies, are given. TABLE 40.—TOTAL AND AVERAGE NUMBER OF LIVE-BORN CHILDREN BORNE BY MARRIED MOTHERS HAVING EITHER A LIVE BIRTH OR A STILLBIRTH IN 1911, CLASSIFIED BY NATIVITY AND AGE OF MOTHER. ══════════════════╤══════════════════════════╤══════════════════════════ │ ALL MARRIED MOTHERS. │ NATIVE MARRIED MOTHERS. ──────────────────┼────────┬─────────────────┼────────┬───────────────── AGE OF MOTHER AT │ │ Live-born │ │ Live-born BIRTH OF CHILD IN │ Total. │ children. │ Total. │ children. 1911. │ │ │ │ ──────────────────┼────────┼────────┬────────┼────────┼────────┬──────── │ │Number. │Average.│ │Number. │Average. ──────────────────┼────────┼────────┼────────┼────────┼────────┼──────── All ages │ 1,465│ 5,363│ 3.7│ 801│ 2,600│ 3.2 ══════════════════╪════════╪════════╪════════╪════════╪════════╪════════ Under 20 years │ 81│ 96│ 1.2│ 62│ 70│ 1.1 20 to 24 years │ 456│ 908│ 2.0│ 258│ 483│ 1.9 25 to 29 years │ 389│ 1,261│ 3.2│ 196│ 536│ 2.7 30 to 39 years │ 459│ 2,480│ 5.4│ 240│ 1,188│ 5.0 40 years and over.│ 80│ 618│ 7.7│ 45│ 323│ 7.2 ──────────────────┴────────┴────────┴────────┴────────┴────────┴────────