生育次数

≤20岁

21~25岁

26~30岁

31~35岁

36~40岁

大于40岁

P1

9 (0.75%)

56 (4.6%)

248 (20.7%)

192 (16%)

93 (7.7%)

55 (4.5%)

P2

0

8 (0.6%)

33 (2.75%)

38 (2.92%)

45 (3.75%)

19 (1.58%)

P3

0

0

1 (0.083%)

4 (0.33%)

5 (0.41%)

4 (0.33)