Table 2. Power low parameters, maximum likelihood estimator, mle and determination coefficient, R², of the human population distribution between 1900 and 2010 in 26 municipalities in the Spanish Central Pyrenees.

Human population
Year	1900	1910	1920	1930	1940	1950	1960	1970	1981	1991	2001	2004	2010
Exponent (Υ)	0.3764	0.3531	0.2961	0.3393	0.4007	0.2460	0.2484	−0.1885	−0.3835	−0.3434	−0.1970	−0.2257	−0.2330
intercept	−9.1287	−0.9013	−8.6461	−8.9024	−9.1349	−8.0900	−7.8464	−4.9755	−3.7646	−3.9365	−4.9970	−4.5968	−4.6271
mle	−0.2535	−0.2632	−0.2931	−0.2216	−0.1049	−0.2316	−0.2890	−0.4543	−0.5300	−0.5124	−0.4820	−0.5233	−0.5552
R2	0.842	0.847	0.8067	0.7867	0.8167	0.831	0.819	0.704	0.745	0.729	0.662	0.611	0.560

All distributions fitted with P-values<0.001.