Chart values used in the essay, extracted from the page. Every value below appears verbatim in the essay; nothing was invented.
cost_bars.csv — materials-cost comparison behind the thin-$50-bar scroll gag.
Source: 3D Printing Industry (“Video: A $50 3D Printed Prosthetic Hand”, Jose Delgado Jr.) for the $50 figure; top-end myoelectric range as stated in the essay.pediatric_cost_grid.csv — lifetime-cost grid behind the pediatric recomputer: one device price × refit interval from age 5 to 18.
Sources: 6–12 month refit cycle from Orthopedics This Week (UNM / Carrie Tingley Hospital); $700–$10,000 conventional pediatric hand from TechX Lab; $30–$50 printed from UTA FabLab. Device prices $5k/$10k/$40k are the essay’s comparison tiers.pediatric_cost_default_series.csv — the default series the recomputer shows ($50 device, 12-month interval): cumulative cost at each age 5–18.grip_bars.csv — peak grip forces behind the evidence section.
Sources: X-Limb (253 g, 21.5 N, PLoS ONE 2020, DOI 10.1371/journal.pone.0232766); Touch Hand 4 (30.4 N, MATEC Web of Conferences 2022); adult-male reference 510 N (Portuguese grip-strength norms, PLoS ONE 2020, DOI 10.1371/journal.pone.0236555).abandonment_bars.csv — mean rejection rates from Biddiss & Chau 2007 (Prosthetics & Orthotics International, DOI 10.1080/03093640600994581), which screened ~200 articles and reported rates in 40.pin_bloom.csv — step labels of the (now removed) pin-map bloom animation: 1 / 8 / 70 / 140+ pins. Stylized, not geographic; 140 was the animation cap, not an exact count.October 10, 2026 (the essay’s “data last checked” date).
pediatric_cost_grid.csv: devices = ceil(156 / interval_months) over ages 5–18; total = devices × device_cost_usd. Computed from the page’s own formula; no new data points.pediatric_cost_default_series.csv: step function generated by the page’s formula for the default settings ($50, 12 months): one $50 device at each whole year from age 5 to 17, flat to 18.