Frequencies for first 10,000 rows of tonrating variable in vindecode dataset : (tonnage | rating) | description | Freq. Percent Cum. ------------+----------------------------------- | 7,560 75.60 75.60 A | 15 0.15 75.75 B | 1,906 19.06 94.81 BD | 1 0.01 94.82 C | 341 3.41 98.23 D | 173 1.73 99.96 E | 3 0.03 99.99 L | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Oct 2016