TABLE 4. Median values of development indicators at estimated start year, plus inter-quartile range (IQR) of indicators over all 1960–2000 region and census observations.

Start year (t10)	n	Median
		Education (yrs)	Electrification (%)	Urbanization (%)	Primary sector (%)
1960–64	63	2.1	30	41	65
1965–69	68	1.9	22	37	69
1970–74	85	1.8	17	32	73
1975–80	100	1.9	22	34	70
1980–	69	2.3	27	32	74
IQR over all  region and census  observations	2,405	1.5–4.8	22–87	33–71	22–72