Frequencies for first 10,000 rows of vctnl_srvc_onst_nrsdnt_sw variable in pos1997 dataset : srv: | vocational- | onsite-non | resid | Freq. Percent Cum. ------------+----------------------------------- | 7,410 74.10 74.10 N | 2,572 25.72 99.82 Y | 18 0.18 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 17 May 2017