Model 1	Model 2	Model 3
Constant	30.628***	6.360***	28.566***
	(7.409)	(1.252)	(7.355)
Percentage of population under 15	-0.471**		-0.461**
	(0.147)		(0.145)
Percentage of population over 75	-1.934		-1.691
	(1.041)		(1.084)
Real per-capita disposable income		0.001	-0.000
		(0.001)	(0.001)
Growth rate of real per-capita disp. income		0.529*	0.410*
		(0.210)	(0.196)
R-squared	0.3	0.2	0.3
N	50	50	50