Duration in years of the interval between births	Order of birth	Total
Total	All orders	347,468
Total	First	166,539
Total	Second	143,540
Total	Third	28,597
Total	Fourth	5,792
Total	Fifth	1,764
Total	Sixth	643
Total	Seventh	290
Total	Eighth	147
Total	Ninth	72
Total	Tenth and subsequent	84
0 years	All orders	25,339
0 years	First	24,002
0 years	Second	978
0 years	Third	250
0 years	Fourth	64
0 years	Fifth	22
0 years	Sixth	11
0 years	Seventh	5
0 years	Eighth	3
0 years	Ninth	..
0 years	Tenth and subsequent	4
1 year	All orders	63,261
1 year	First	39,084
1 year	Second	18,872
1 year	Third	3,727
1 year	Fourth	945
1 year	Fifth	336
1 year	Sixth	137
1 year	Seventh	76
1 year	Eighth	39
1 year	Ninth	20
1 year	Tenth and subsequent	25
2 years	All orders	70,553
2 years	First	33,012
2 years	Second	31,190
2 years	Third	4,761
2 years	Fourth	1,026
2 years	Fifth	310
2 years	Sixth	133
2 years	Seventh	57
2 years	Eighth	31
2 years	Ninth	13
2 years	Tenth and subsequent	20
3 years	All orders	57,259
3 years	First	23,044
3 years	Second	28,761
3 years	Third	4,301
3 years	Fourth	769
3 years	Fifth	240
3 years	Sixth	70
3 years	Seventh	43
3 years	Eighth	14
3 years	Ninth	10
3 years	Tenth and subsequent	7
4 years	All orders	41,055
4 years	First	15,396
4 years	Second	21,371
4 years	Third	3,427
4 years	Fourth	592
4 years	Fifth	153
4 years	Sixth	63
4 years	Seventh	25
4 years	Eighth	15
4 years	Ninth	9
4 years	Tenth and subsequent	4
5 years	All orders	27,874
5 years	First	10,315
5 years	Second	14,021
5 years	Third	2,806
5 years	Fourth	485
5 years	Fifth	159
5 years	Sixth	50
5 years	Seventh	17
5 years	Eighth	11
5 years	Ninth	5
5 years	Tenth and subsequent	5
6 years	All orders	18,485
6 years	First	6,918
6 years	Second	8,884
6 years	Third	2,102
6 years	Fourth	403
6 years	Fifth	115
6 years	Sixth	34
6 years	Seventh	15
6 years	Eighth	6
6 years	Ninth	4
6 years	Tenth and subsequent	4
7 years	All orders	13,072
7 years	First	4,855
7 years	Second	6,049
7 years	Third	1,718
7 years	Fourth	327
7 years	Fifth	74
7 years	Sixth	29
7 years	Seventh	16
7 years	Eighth	1
7 years	Ninth	..
7 years	Tenth and subsequent	3
8 years	All orders	8,699
8 years	First	3,187
8 years	Second	3,875
8 years	Third	1,270
8 years	Fourth	255
8 years	Fifth	72
8 years	Sixth	20
8 years	Seventh	11
8 years	Eighth	6
8 years	Ninth	2
8 years	Tenth and subsequent	1
9 years	All orders	5,734
9 years	First	1,959
9 years	Second	2,543
9 years	Third	972
9 years	Fourth	189
9 years	Fifth	50
9 years	Sixth	15
9 years	Seventh	2
9 years	Eighth	1
9 years	Ninth	2
9 years	Tenth and subsequent	1
10 years	All orders	4,197
10 years	First	1,364
10 years	Second	1,822
10 years	Third	786
10 years	Fourth	172
10 years	Fifth	34
10 years	Sixth	14
10 years	Seventh	1
10 years	Eighth	4
10 years	Ninth	..
10 years	Tenth and subsequent	..
11 years	All orders	3,016
11 years	First	922
11 years	Second	1,345
11 years	Third	561
11 years	Fourth	124
11 years	Fifth	41
11 years	Sixth	13
11 years	Seventh	5
11 years	Eighth	3
11 years	Ninth	..
11 years	Tenth and subsequent	2
12 years and more	All orders	8,924
12 years and more	First	2,481
12 years and more	Second	3,829
12 years and more	Third	1,916
12 years and more	Fourth	441
12 years and more	Fifth	158
12 years and more	Sixth	54
12 years and more	Seventh	17
12 years and more	Eighth	13
12 years and more	Ninth	7
12 years and more	Tenth and subsequent	8