Frequencies for first 10,000 rows of prov2855 variable in pos1999 dataset :

 stations - |
      total |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,395       93.95       93.95
          1 |          1        0.01       93.96
          2 |          4        0.04       94.00
          3 |          7        0.07       94.07
          4 |          6        0.06       94.13
          5 |          8        0.08       94.21
          6 |         22        0.22       94.43
          7 |         12        0.12       94.55
          8 |         23        0.23       94.78
          9 |         25        0.25       95.03
         10 |         73        0.73       95.76
         11 |          8        0.08       95.84
         12 |         50        0.50       96.34
         13 |         30        0.30       96.64
         14 |         22        0.22       96.86
         15 |         28        0.28       97.14
         16 |         40        0.40       97.54
         17 |         15        0.15       97.69
         18 |         26        0.26       97.95
         19 |         19        0.19       98.14
         20 |         39        0.39       98.53
         21 |         25        0.25       98.78
         22 |         24        0.24       99.02
         23 |          6        0.06       99.08
         24 |         21        0.21       99.29
         25 |         20        0.20       99.49
         26 |          8        0.08       99.57
         27 |          4        0.04       99.61
         28 |         11        0.11       99.72
         29 |          3        0.03       99.75
         30 |          3        0.03       99.78
         31 |          3        0.03       99.81
         32 |          3        0.03       99.84
         33 |          1        0.01       99.85
         34 |          4        0.04       99.89
         35 |          1        0.01       99.90
         36 |          2        0.02       99.92
         38 |          2        0.02       99.94
         40 |          1        0.01       99.95
         41 |          1        0.01       99.96
         42 |          1        0.01       99.97
         49 |          1        0.01       99.98
         59 |          1        0.01       99.99
         76 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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