Frequencies for first 10,000 rows of educmsa variable in linkco1991us_num dataset : Education | of Mother | (Based on | SMSA) | Freq. Percent Cum. ------------+----------------------------------- 0 | 1,294 12.94 12.94 1 | 8,706 87.06 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015