Decriptive statistics:全国-X					
	(1)	(2)	(3)	(4)	(5)
VARIABLES	N	mean	sd	min	max
					
maweek	900.000	19.786	3.686	14.000	25.429
maweek_add	900.000	5.833	2.025	4.286	9.286
					
