_id	期間	第１子	第２子	第３子	第４子	第５子～
1	""		""	""	""	""
2	総数（実数）	4690	4277.0	1520.0	350.0	102.0
3	""		""	""	""	""
4	　１年未満	1056	142.0	60.0	18.0	7.0
5	　１年以上２年未満	1242	147.0	24.0	16.0	4.0
6	　２～３	1045	537.0	55.0	16.0	3.0
7	　３～４	577	860.0	69.0	12.0	3.0
8	　４～５	323	787.0	121.0	11.0	3.0
9	　５～６	163	625.0	214.0	18.0	3.0
10	　６～７	98	439.0	200.0	30.0	2.0
11	　７～８	71	238.0	225.0	43.0	8.0
12	　８～９	46	172.0	172.0	29.0	6.0
13	　９～１０	24	111.0	115.0	39.0	7.0
14	　１０～１５	32	147.0	211.0	79.0	36.0
15	　１５～２０	12	11.0	15.0	16.0	13.0
16	　　２０～	1	2.0	1.0	1.0	1.0
17	""		""	""	""	""
18	　　平均期間	2.460358919687279044552496998221613466739654541015625	．	．	．	．
19	""		""	""	""	""
20	総数（百分率）	100	100.0	100.0	100.0	100.0
21	""		""	""	""	""
22	　１年未満	22.51599147121535082760601653717458248138427734375	3.32008417115	3.94736842105	5.14285714286	6.86274509804
23	　１年以上２年未満	26.481876332622601211141954991035163402557373046875	3.43698854337	1.57894736842	4.57142857143	3.92156862745
24	　２～３	22.281449893390192329434285056777298450469970703125	12.5555295768	3.61842105263	4.57142857143	2.94117647059
25	　３～４	12.302771855010661283813533373177051544189453125	20.1075520224	4.53947368421	3.42857142857	2.94117647059
26	　４～５	6.8869936034115131207045124028809368610382080078125	18.400748188	7.96052631579	3.14285714286	2.94117647059
27	　５～６	3.475479744136460880099548376165330410003662109375	14.6130465279	14.0789473684	5.14285714286	2.94117647059
28	　６～７	2.089552238805970407753420658991672098636627197265625	10.2642038812	13.1578947368	8.57142857143	1.96078431373
29	　７～８	1.5138592750533048647554323906661011278629302978515625	5.56464811784	14.8026315789	12.2857142857	7.8431372549
30	　８～９	0.9808102345415778966497555302339605987071990966796875	4.02151040449	11.3157894737	8.28571428571	5.88235294118
31	　９～１０	0.511727078891258013726428544032387435436248779296875	2.59527706336	7.56578947368	11.1428571429	6.86274509804
32	　１０～１５	0.68230277185501064796113723787129856646060943603515625	3.43698854337	13.8815789474	22.5714285714	35.2941176471
33	　１５～２０	0.2558635394456290068632142720161937177181243896484375	0.257189618892	0.986842105263	4.57142857143	12.7450980392
34	　　２０～	0.0213219616204690827487855386834780802018940448760986328125	0.0467617488894	0.0657894736842	0.285714285714	0.980392156863