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Table 1 Sample sizes for different ranges of age (in years) and socio-economic status for each year, given to aid comparison of the analytical results to the data

From: Modelling fertility in rural South Africa with combined nonlinear parametric and semi-parametric methods

Age SES Years
2001 2003 2005 2007 2009 2011
10–20 1–2 3063 2883 1772 1033 828 788
2–3 5333 5784 6497 6402 8097 6769
3–4 370 362 356 651 1156 1819
20–30 1–2 2046 1915 1183 716 578 570
2–3 3718 4291 5214 5223 6980 6305
3–4 254 241 279 567 1125 1832
30–40 1–2 1537 1331 827 502 445 409
2–3 2644 2960 3439 3427 4448 3842
3–4 187 210 178 401 678 1104
40–50 1–2 990 911 558 337 278 275
2–3 1631 1797 2115 2392 3067 2598
3–4 115 105 108 247 482 809
  1. Each value is given for chosen example intervals of age and SES values taken from an overall continuous range, where the lower age/SES value of the interval is inclusive and the upper age/SES value is exclusive