Frequencies for first 10,000 rows of effective_date variable in nadac20160106 dataset : Effective | Date of the | NADAC Per | Unit Cost | Freq. Percent Cum. ------------+----------------------------------- 01jan2015 | 14 0.14 0.14 05jan2015 | 7 0.07 0.21 06jan2015 | 16 0.16 0.37 07jan2015 | 17 0.17 0.54 10jan2015 | 4 0.04 0.58 21jan2015 | 15 0.15 0.73 29jan2015 | 1 0.01 0.74 11feb2015 | 1 0.01 0.75 18feb2015 | 37 0.37 1.12 16mar2015 | 1 0.01 1.13 18mar2015 | 29 0.29 1.42 27mar2015 | 1 0.01 1.43 01apr2015 | 17 0.17 1.60 02apr2015 | 6 0.06 1.66 03apr2015 | 1 0.01 1.67 07apr2015 | 7 0.07 1.74 08apr2015 | 1 0.01 1.75 16apr2015 | 2 0.02 1.77 22apr2015 | 82 0.82 2.59 23apr2015 | 35 0.35 2.94 24apr2015 | 1 0.01 2.95 01may2015 | 5 0.05 3.00 08may2015 | 1 0.01 3.01 15may2015 | 2 0.02 3.03 18may2015 | 9 0.09 3.12 20may2015 | 65 0.65 3.77 29may2015 | 3 0.03 3.80 30may2015 | 37 0.37 4.17 02jun2015 | 2 0.02 4.19 04jun2015 | 13 0.13 4.32 10jun2015 | 1 0.01 4.33 17jun2015 | 110 1.10 5.43 24jun2015 | 1 0.01 5.44 30jun2015 | 5 0.05 5.49 01jul2015 | 87 0.87 6.36 02jul2015 | 2 0.02 6.38 07jul2015 | 60 0.60 6.98 09jul2015 | 1 0.01 6.99 22jul2015 | 83 0.83 7.82 31jul2015 | 33 0.33 8.15 01aug2015 | 2 0.02 8.17 03aug2015 | 3 0.03 8.20 10aug2015 | 1 0.01 8.21 12aug2015 | 4 0.04 8.25 14aug2015 | 2 0.02 8.27 19aug2015 | 69 0.69 8.96 25aug2015 | 3 0.03 8.99 26aug2015 | 1 0.01 9.00 28aug2015 | 5 0.05 9.05 31aug2015 | 1 0.01 9.06 16sep2015 | 1 0.01 9.07 23sep2015 | 73 0.73 9.80 24sep2015 | 6 0.06 9.86 01oct2015 | 27 0.27 10.13 02oct2015 | 11 0.11 10.24 08oct2015 | 9 0.09 10.33 09oct2015 | 2 0.02 10.35 14oct2015 | 5 0.05 10.40 19oct2015 | 1 0.01 10.41 21oct2015 | 148 1.48 11.89 23oct2015 | 2 0.02 11.91 28oct2015 | 1 0.01 11.92 04nov2015 | 2 0.02 11.94 06nov2015 | 5 0.05 11.99 11nov2015 | 4 0.04 12.03 12nov2015 | 15 0.15 12.18 17nov2015 | 1 0.01 12.19 18nov2015 | 280 2.80 14.99 19nov2015 | 10 0.10 15.09 25nov2015 | 12 0.12 15.21 01dec2015 | 69 0.69 15.90 02dec2015 | 1 0.01 15.91 03dec2015 | 5 0.05 15.96 09dec2015 | 4 0.04 16.00 16dec2015 | 6 0.06 16.06 21dec2015 | 1 0.01 16.07 22dec2015 | 9 0.09 16.16 23dec2015 | 7,943 79.43 95.59 30dec2015 | 13 0.13 95.72 31dec2015 | 7 0.07 95.79 01jan2016 | 388 3.88 99.67 06jan2016 | 33 0.33 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 10 Feb 2018