Table 2 Distribution of all births and births of babies with DS, by year and maternal age group
|  | 1998 | 1997–1999 | 2002 | 2000–2002 |
|---|---|---|---|---|
| Â | Births (%) | DS Births (%) | Births (%) | DS births (%) |
| Â | N = 61 080 | N = 166 | N = 61 883 | N = 180 |
Maternal age group | ||||
0–34 | 81.6 | 64.5 | 78.6 | 53.3 |
35–36 | 8.9 | 7.8 | 9.7 | 13.9 |
37–39 | 6.9 | 15.7 | 8.2 | 17.8 |
40 plus | 2.6 | 12.0 | 3.5 | 15.0 |
Total <37 | 90.5 | 72.3 | 88.3 | 67.2 |
Total 37 and over | 9.5 | 27.7 | *11.7 | NS 32.8 |