Frequencies for first 10,000 rows of prov2855 variable in pos1996 dataset :

 stations - |
      total |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,469       94.69       94.69
          1 |          2        0.02       94.71
          2 |          5        0.05       94.76
          3 |          9        0.09       94.85
          4 |          5        0.05       94.90
          5 |          8        0.08       94.98
          6 |         25        0.25       95.23
          7 |         15        0.15       95.38
          8 |         26        0.26       95.64
          9 |         21        0.21       95.85
         10 |         61        0.61       96.46
         11 |         16        0.16       96.62
         12 |         44        0.44       97.06
         13 |         25        0.25       97.31
         14 |         27        0.27       97.58
         15 |         31        0.31       97.89
         16 |         31        0.31       98.20
         17 |         14        0.14       98.34
         18 |         18        0.18       98.52
         19 |         13        0.13       98.65
         20 |         24        0.24       98.89
         21 |         18        0.18       99.07
         22 |         18        0.18       99.25
         23 |          3        0.03       99.28
         24 |         13        0.13       99.41
         25 |         15        0.15       99.56
         26 |          6        0.06       99.62
         27 |          4        0.04       99.66
         28 |         10        0.10       99.76
         29 |          1        0.01       99.77
         30 |          4        0.04       99.81
         31 |          2        0.02       99.83
         32 |          2        0.02       99.85
         33 |          2        0.02       99.87
         34 |          2        0.02       99.89
         35 |          1        0.01       99.90
         36 |          2        0.02       99.92
         37 |          1        0.01       99.93
         40 |          3        0.03       99.96
         42 |          1        0.01       99.97
         46 |          1        0.01       99.98
         48 |          1        0.01       99.99
         56 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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