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Table 4 Distribution of birth years and kinship coefficients among married OOA couples with offspring in AGDB4.

From: PedHunter 2.0 and its usage to characterize the founder structure of the Old Order Amish of Lancaster County

Birth year #(couples) Average 25% percentile Median 75% percentile
1866-1875 98 0.0244 0.0164 0.0258 0.0315
1876-1885 113 0.0272 0.0164 0.0258 0.0350
1886-1895 161 0.0272 0.0183 0.0267 0.0363
1896-1905 184 0.0286 0.0194 0.0292 0.0382
1906-1915 245 0.0289 0.0222 0.0309 0.0374
1916-1925 366 0.0300 0.0218 0.0297 0.0387
1926-1935 467 0.0317 0.0241 0.0318 0.0402
1936-1945 739 0.0310 0.0241 0.0326 0.0392
1946-1955 1,103 0.0315 0.0247 0.0319 0.0396
1956-1965 1,390 0.0335 0.0274 0.0344 0.0408
1966-1975 1,731 0.0352 0.0296 0.0352 0.0414
1976-1985 607 0.0363 0.0302 0.0359 0.0416
Union set 7,273 0.0326 0.0259 0.0333 0.0402
  1. Birth year cohorts of ten years are reported in rows. A couple is assigned to the interval containing the average of the two birth years. Numbers of married OOA couples #(couples) and kinship coefficients are reported in columns. Couples born later tend to have larger kinship coefficients.