Babies born in January | Babies born in July | Total | |||||||
No. of questionnaires delivered | No. of questionnaires collected | Rate of collection | No. of questionnaires delivered | No. of questionnaires collected | Rate of collection | No. of questionnaires delivered | No. of questionnaires collected | Rate of collection | |
1st survey | 26,620 | 23,423 | 88.0% | 26,955 | 23,592 | 87.5% | 53,575 | 47,015 | 87.8% |
2nd survey | 23,391 | 21,923 | 93.7% | 23,575 | 22,002 | 93.3% | 46,966 | 43,925 | 93.5% |
3rd survey | 23,374 | 21,365 | 91.4% | 23,523 | 21,447 | 91.2% | 46,897 | 42,812 | 91.3% |
4th survey | 22,439 | 20,699 | 92.2% | 22,398 | 20,858 | 93.1% | 44,837 | 41,557 | 92.7% |
1) | Symbols used in tables
| |||||||
2) | The numbers indicated in this outline are rounded. The grand total may not equal the sum of the breakdown numbers. |