Frequencies for first 10,000 rows of pastfl variable in namcs2014 dataset : Was | variable | imputed: | number of | past visits | in last 12 | months | Freq. Percent Cum. ------------+----------------------------------- Not imputed | 9,068 90.68 90.68 Imputed | 932 9.32 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 27 Mar 2017