Frequencies for first 10,000 rows of prov2855 variable in pos2006 dataset :

 stations - |
      total |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,240       92.40       92.40
          1 |          6        0.06       92.46
          2 |          6        0.06       92.52
          3 |          6        0.06       92.58
          4 |          5        0.05       92.63
          5 |          6        0.06       92.69
          6 |         20        0.20       92.89
          7 |         12        0.12       93.01
          8 |         25        0.25       93.26
          9 |         25        0.25       93.51
         10 |         71        0.71       94.22
         11 |          8        0.08       94.30
         12 |         75        0.75       95.05
         13 |         29        0.29       95.34
         14 |         26        0.26       95.60
         15 |         38        0.38       95.98
         16 |         50        0.50       96.48
         17 |         24        0.24       96.72
         18 |         28        0.28       97.00
         19 |         20        0.20       97.20
         20 |         50        0.50       97.70
         21 |         35        0.35       98.05
         22 |         29        0.29       98.34
         23 |          5        0.05       98.39
         24 |         48        0.48       98.87
         25 |         22        0.22       99.09
         26 |         11        0.11       99.20
         27 |          4        0.04       99.24
         28 |         11        0.11       99.35
         29 |          5        0.05       99.40
         30 |         15        0.15       99.55
         31 |          5        0.05       99.60
         32 |          7        0.07       99.67
         33 |          2        0.02       99.69
         34 |          4        0.04       99.73
         35 |          1        0.01       99.74
         36 |          9        0.09       99.83
         37 |          1        0.01       99.84
         38 |          3        0.03       99.87
         40 |          3        0.03       99.90
         41 |          1        0.01       99.91
         42 |          1        0.01       99.92
         44 |          1        0.01       99.93
         47 |          1        0.01       99.94
         48 |          1        0.01       99.95
         54 |          1        0.01       99.96
         56 |          1        0.01       99.97
         60 |          1        0.01       99.98
         76 |          1        0.01       99.99
        161 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016