Frequencies for first 10,000 rows of prov6430 variable in posclia2008 dataset : total ppm | test | volumes | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,882 98.82 98.82 4 | 1 0.01 98.83 5 | 2 0.02 98.85 7 | 1 0.01 98.86 8 | 2 0.02 98.88 10 | 3 0.03 98.91 13 | 1 0.01 98.92 20 | 4 0.04 98.96 25 | 2 0.02 98.98 30 | 1 0.01 98.99 36 | 3 0.03 99.02 41 | 1 0.01 99.03 42 | 1 0.01 99.04 47 | 1 0.01 99.05 50 | 12 0.12 99.17 58 | 1 0.01 99.18 61 | 1 0.01 99.19 69 | 1 0.01 99.20 70 | 1 0.01 99.21 75 | 1 0.01 99.22 77 | 1 0.01 99.23 80 | 1 0.01 99.24 83 | 1 0.01 99.25 95 | 1 0.01 99.26 100 | 9 0.09 99.35 120 | 1 0.01 99.36 138 | 1 0.01 99.37 139 | 1 0.01 99.38 148 | 1 0.01 99.39 150 | 2 0.02 99.41 152 | 1 0.01 99.42 160 | 1 0.01 99.43 192 | 1 0.01 99.44 200 | 3 0.03 99.47 210 | 1 0.01 99.48 213 | 1 0.01 99.49 265 | 1 0.01 99.50 300 | 6 0.06 99.56 400 | 2 0.02 99.58 430 | 1 0.01 99.59 479 | 1 0.01 99.60 500 | 6 0.06 99.66 564 | 1 0.01 99.67 700 | 2 0.02 99.69 720 | 1 0.01 99.70 732 | 1 0.01 99.71 797 | 1 0.01 99.72 800 | 1 0.01 99.73 887 | 1 0.01 99.74 1000 | 4 0.04 99.78 1019 | 1 0.01 99.79 1020 | 1 0.01 99.80 1066 | 1 0.01 99.81 1100 | 2 0.02 99.83 1135 | 1 0.01 99.84 1200 | 2 0.02 99.86 1487 | 1 0.01 99.87 1560 | 1 0.01 99.88 1898 | 1 0.01 99.89 1900 | 1 0.01 99.90 2203 | 1 0.01 99.91 2472 | 1 0.01 99.92 2600 | 1 0.01 99.93 4000 | 1 0.01 99.94 6062 | 1 0.01 99.95 6661 | 1 0.01 99.96 7000 | 1 0.01 99.97 9800 | 1 0.01 99.98 16768 | 1 0.01 99.99 22720 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 26 Jan 2016