Frequencies for first 10,000 rows of dlys_stn_cnt variable in pos2012 dataset :

 Stations - |
      Total |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         87        0.87        0.87
          1 |          6        0.06        0.93
          2 |          5        0.05        0.98
          3 |          9        0.09        1.07
          4 |          5        0.05        1.12
          5 |          7        0.07        1.19
          6 |         17        0.17        1.36
          7 |         12        0.12        1.48
          8 |         34        0.34        1.82
          9 |         33        0.33        2.15
         10 |         53        0.53        2.68
         11 |         11        0.11        2.79
         12 |         77        0.77        3.56
         13 |         34        0.34        3.90
         14 |         25        0.25        4.15
         15 |         34        0.34        4.49
         16 |         58        0.58        5.07
         17 |         29        0.29        5.36
         18 |         28        0.28        5.64
         19 |         16        0.16        5.80
         20 |         68        0.68        6.48
         21 |         35        0.35        6.83
         22 |         25        0.25        7.08
         23 |          9        0.09        7.17
         24 |         75        0.75        7.92
         25 |         23        0.23        8.15
         26 |         15        0.15        8.30
         27 |          2        0.02        8.32
         28 |         11        0.11        8.43
         29 |          1        0.01        8.44
         30 |         15        0.15        8.59
         31 |          5        0.05        8.64
         32 |         13        0.13        8.77
         33 |          3        0.03        8.80
         34 |          6        0.06        8.86
         35 |          2        0.02        8.88
         36 |          7        0.07        8.95
         38 |          2        0.02        8.97
         39 |          1        0.01        8.98
         40 |          3        0.03        9.01
         42 |          2        0.02        9.03
         43 |          1        0.01        9.04
         48 |          1        0.01        9.05
         52 |          1        0.01        9.06
         55 |          1        0.01        9.07
         56 |          1        0.01        9.08
         60 |          1        0.01        9.09
         76 |          1        0.01        9.10
          . |      9,090       90.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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