Frequencies for first 10,000 rows of prov2855 variable in pos1991 dataset :

 stations - |
      total |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,575       95.75       95.75
          1 |          2        0.02       95.77
          2 |          4        0.04       95.81
          3 |          9        0.09       95.90
          4 |          4        0.04       95.94
          5 |         11        0.11       96.05
          6 |         25        0.25       96.30
          7 |         21        0.21       96.51
          8 |         31        0.31       96.82
          9 |         22        0.22       97.04
         10 |         43        0.43       97.47
         11 |         16        0.16       97.63
         12 |         35        0.35       97.98
         13 |         16        0.16       98.14
         14 |         20        0.20       98.34
         15 |         20        0.20       98.54
         16 |         19        0.19       98.73
         17 |          9        0.09       98.82
         18 |         18        0.18       99.00
         19 |          5        0.05       99.05
         20 |         26        0.26       99.31
         21 |         12        0.12       99.43
         22 |         13        0.13       99.56
         23 |          3        0.03       99.59
         24 |          5        0.05       99.64
         25 |         11        0.11       99.75
         26 |          4        0.04       99.79
         27 |          3        0.03       99.82
         28 |          3        0.03       99.85
         29 |          1        0.01       99.86
         30 |          1        0.01       99.87
         31 |          3        0.03       99.90
         32 |          1        0.01       99.91
         33 |          1        0.01       99.92
         34 |          1        0.01       99.93
         35 |          1        0.01       99.94
         36 |          1        0.01       99.95
         37 |          2        0.02       99.97
         41 |          1        0.01       99.98
         42 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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