Frequencies for first 10,000 rows of prov1695 variable in pos1991 dataset :

psychiatric |
       unit |
  effective |
       date |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,816       98.16       98.16
     831001 |          6        0.06       98.22
     840101 |         24        0.24       98.46
     840201 |          1        0.01       98.47
     840401 |          2        0.02       98.49
     840501 |          1        0.01       98.50
     840601 |          3        0.03       98.53
     840701 |         60        0.60       99.13
     840801 |          1        0.01       99.14
     840901 |          5        0.05       99.19
     840923 |          1        0.01       99.20
     841101 |          1        0.01       99.21
     850101 |          5        0.05       99.26
     850201 |          1        0.01       99.27
     850701 |          2        0.02       99.29
     851001 |          2        0.02       99.31
     851201 |          1        0.01       99.32
     860101 |          1        0.01       99.33
     860201 |          1        0.01       99.34
     860701 |          5        0.05       99.39
     861001 |          3        0.03       99.42
     870401 |          1        0.01       99.43
     870601 |          2        0.02       99.45
     870701 |          2        0.02       99.47
     871001 |          2        0.02       99.49
     880101 |          5        0.05       99.54
     880108 |          1        0.01       99.55
     880601 |          1        0.01       99.56
     880608 |          1        0.01       99.57
     880701 |          8        0.08       99.65
     880901 |          1        0.01       99.66
     881001 |          2        0.02       99.68
     890101 |          5        0.05       99.73
     890701 |          6        0.06       99.79
     900101 |          3        0.03       99.82
     900601 |          1        0.01       99.83
     900701 |          4        0.04       99.87
     901001 |          2        0.02       99.89
     901201 |          1        0.01       99.90
     910101 |          1        0.01       99.91
     910401 |          2        0.02       99.93
     910501 |          3        0.03       99.96
     910607 |          1        0.01       99.97
     910701 |          2        0.02       99.99
     911001 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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