Frequencies for first 10,000 rows of prov3230 variable in pos1999 dataset : state | abbreviatio | n | Freq. Percent Cum. ------------+----------------------------------- AK | 199 1.99 1.99 AL | 1,490 14.90 16.89 AR | 1,576 15.76 32.65 AZ | 1,087 10.87 43.52 CA | 5,648 56.48 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 26 Jan 2016