Table 3.
Number and rate* (95% confidence interval) of triplet and higher-order (triplet+) multiple live births in Canada (excluding Ontario) and the United States, 1991–2009
|
Year |
Canada (excluding Ontario) |
United States |
||||
|---|---|---|---|---|---|---|
| |
Number of live births |
Triplet+ live births |
Number of live births |
Triplet+ live births |
||
| Number | Rate (95% CI) | Number | Rate (95% CI) | |||
| 1991 |
250847 |
131 |
52.2 (43.7-62.0) |
4110907 |
3346 |
81.4 (78.7-84.2) |
| 1992 |
247898 |
130 |
52.4 (43.8-62.3) |
4065014 |
3883 |
95.5 (92.6-98.6) |
| 1993 |
240468 |
196 |
81.5 (70.5-93.8) |
4000240 |
4168 |
104.2 (101.1-107.4) |
| 1994 |
238069 |
148 |
62.2 (52.5-73.0) |
3952767 |
4594 |
116.2 (112.9-119.6) |
| 1995 |
231813 |
118 |
50.9 (42.1-61.0) |
3899589 |
4973 |
127.5 (124.0-131.1) |
| 1996 |
226180 |
141 |
62.3 (52.5-73.5) |
3891494 |
5939 |
152.6 (148.8-156.6) |
| 1997 |
215588 |
218 |
101.1 (88.1-115.5) |
3880894 |
6737 |
173.6 (169.5-177.8) |
| 1998 |
209795 |
204 |
97.2 (84.4-111.5) |
3941553 |
7625 |
193.5 (189.2-197.9) |
| 1999 |
206169 |
194 |
94.1 (81.4-108.3) |
3959417 |
7321 |
184.9 (180.7-189.1) |
| 2000 |
200476 |
164 |
81.8 (69.8-95.3) |
4058814 |
7325 |
180.5 (176.4-184.6) |
| 2001 |
202036 |
202 |
100.0 (86.7-114.8) |
4025933 |
7471 |
185.6 (181.4-189.8) |
| 2002 |
200287 |
209 |
104.4 (90.7-119.5) |
4021726 |
7401 |
184.0 (179.8-188.3) |
| 2003 |
204279 |
227 |
111.1 (97.2-126.5) |
4089950 |
7663 |
187.4 (183.2-191.6) |
| 2004 |
204521 |
228 |
111.5 (97.5-127.0) |
4112052 |
7275 |
176.9 (172.9-181.1) |
| 2005 |
208416 |
187 |
89.7 (77.3-103.5) |
4138349 |
6694 |
161.8 (157.9-165.7) |
| 2006 |
219202 |
157 |
71.6 (60.9-83.8) |
4265555 |
6540 |
153.3 (149.6-157.1) |
| 2007 |
229428 |
178 |
77.6 (66.6-89.8) |
4316233 |
6427 |
148.9 (145.3-152.6) |
| 2008 |
237342 |
202 |
85.1 (73.8-97.6) |
4247694 |
6268 |
147.6 (143.9-151.2) |
| 2009 | 240823 | 201 | 83.5 (72.3-95.8) | 4130665 | 6340 | 153.5 (149.7-157.3) |
* Rates expressed per 100,000 live births.