Table II.

Trends in fertility, survival, and net reproduction rates, Agincourt 1992–2004 (prospective study).

	First 2 years	3-year period			Last 2 years
Age group	1992–1993	1994–1996	1997–1999	2000–2002	2003–2004
	Fertility rates
12–16	0.1729	0.1525	0.1463	0.1500	0.1219
17–21	0.7573	0.6374	0.6230	0.5870	0.4992
22–26	0.7693	0.5849	0.6656	0.5800	0.5261
27–31	0.7495	0.6262	0.5771	0.5396	0.4700
32–36	0.5958	0.5629	0.5080	0.4499	0.3911
37–41	0.5138	0.3743	0.3582	0.3275	0.2990
42–46	0.1911	0.1759	0.1649	0.1290	0.1152
47–50	0.0405	0.0492	0.0352	0.0319	0.0123
	Survival rates
12–16	0.9500	0.9651	0.9499	0.9390	0.9289
17–21	0.9441	0.9592	0.9446	0.9322	0.9208
22–26	0.9418	0.9531	0.9328	0.9129	0.8962
27–31	0.9335	0.9455	0.9180	0.8824	0.8388
32–36	0.9160	0.9325	0.8999	0.8385	0.7817
37–41	0.9018	0.9162	0.8737	0.7969	0.7228
42–46	0.8836	0.8986	0.8423	0.7586	0.6657
47–50	0.8706	0.8832	0.8227	0.7246	0.6246
	Net reproduction rates
12–16	0.082	0.074	0.069	0.070	0.057
17–21	0.357	0.306	0.294	0.274	0.230
22–26	0.362	0.279	0.310	0.265	0.236
27–31	0.350	0.296	0.265	0.238	0.197
32–36	0.273	0.262	0.229	0.189	0.153
37–41	0.232	0.171	0.156	0.130	0.108
42–46	0.084	0.079	0.069	0.049	0.038
47–50	0.018	0.022	0.014	0.012	0.004
Total	1.758	1.489	1.408	1.226	1.022