Frequencies for first 10,000 rows of effective_date variable in nadac20170913 dataset : Effective | Date of the | NADAC Per | Unit Cost | Freq. Percent Cum. ------------+----------------------------------- 21sep2016 | 23 0.23 0.23 23sep2016 | 1 0.01 0.24 01oct2016 | 1 0.01 0.25 12oct2016 | 1 0.01 0.26 13oct2016 | 2 0.02 0.28 19oct2016 | 68 0.68 0.96 23nov2016 | 28 0.28 1.24 01dec2016 | 2 0.02 1.26 14dec2016 | 4 0.04 1.30 21dec2016 | 66 0.66 1.96 26dec2016 | 13 0.13 2.09 31dec2016 | 7 0.07 2.16 01jan2017 | 141 1.41 3.57 02jan2017 | 2 0.02 3.59 04jan2017 | 38 0.38 3.97 06jan2017 | 18 0.18 4.15 09jan2017 | 2 0.02 4.17 16jan2017 | 1 0.01 4.18 18jan2017 | 71 0.71 4.89 19jan2017 | 1 0.01 4.90 23jan2017 | 2 0.02 4.92 17feb2017 | 1 0.01 4.93 22feb2017 | 302 3.02 7.95 23feb2017 | 2 0.02 7.97 28feb2017 | 1 0.01 7.98 02mar2017 | 1 0.01 7.99 08mar2017 | 3 0.03 8.02 15mar2017 | 1 0.01 8.03 17mar2017 | 1 0.01 8.04 22mar2017 | 132 1.32 9.36 23mar2017 | 3 0.03 9.39 29mar2017 | 2 0.02 9.41 01apr2017 | 3 0.03 9.44 03apr2017 | 4 0.04 9.48 07apr2017 | 3 0.03 9.51 12apr2017 | 2 0.02 9.53 19apr2017 | 106 1.06 10.59 24apr2017 | 10 0.10 10.69 02may2017 | 5 0.05 10.74 03may2017 | 1 0.01 10.75 16may2017 | 1 0.01 10.76 17may2017 | 139 1.39 12.15 31may2017 | 3 0.03 12.18 01jun2017 | 145 1.45 13.63 07jun2017 | 2 0.02 13.65 08jun2017 | 17 0.17 13.82 21jun2017 | 163 1.63 15.45 28jun2017 | 1 0.01 15.46 01jul2017 | 5 0.05 15.51 05jul2017 | 7 0.07 15.58 11jul2017 | 45 0.45 16.03 12jul2017 | 6 0.06 16.09 14jul2017 | 1 0.01 16.10 19jul2017 | 437 4.37 20.47 26jul2017 | 1 0.01 20.48 27jul2017 | 1 0.01 20.49 01aug2017 | 1 0.01 20.50 02aug2017 | 4 0.04 20.54 09aug2017 | 8 0.08 20.62 16aug2017 | 17 0.17 20.79 17aug2017 | 2 0.02 20.81 23aug2017 | 7,855 78.55 99.36 24aug2017 | 2 0.02 99.38 30aug2017 | 7 0.07 99.45 06sep2017 | 16 0.16 99.61 13sep2017 | 39 0.39 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 10 Feb 2018