Frequencies for first 10,000 rows of prov1710 variable in pos2001 dataset :

psychiatric |
       unit |
termination |
       date |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,894       98.94       98.94
   19850701 |          2        0.02       98.96
   19850923 |          1        0.01       98.97
   19851224 |          1        0.01       98.98
   19860701 |          3        0.03       99.01
   19880101 |          1        0.01       99.02
   19880201 |          1        0.01       99.03
   19880301 |          1        0.01       99.04
   19880701 |          2        0.02       99.06
   19880731 |          1        0.01       99.07
   19881001 |          1        0.01       99.08
   19881231 |          1        0.01       99.09
   19890101 |          3        0.03       99.12
   19890630 |          1        0.01       99.13
   19890701 |          6        0.06       99.19
   19890901 |          1        0.01       99.20
   19900101 |          1        0.01       99.21
   19901101 |          1        0.01       99.22
   19910101 |          2        0.02       99.24
   19910531 |          1        0.01       99.25
   19910630 |          1        0.01       99.26
   19910701 |          2        0.02       99.28
   19911001 |          1        0.01       99.29
   19920226 |          1        0.01       99.30
   19920304 |          1        0.01       99.31
   19920501 |          1        0.01       99.32
   19920701 |          1        0.01       99.33
   19920814 |          1        0.01       99.34
   19920831 |          1        0.01       99.35
   19920902 |          1        0.01       99.36
   19921027 |          1        0.01       99.37
   19921218 |          1        0.01       99.38
   19930101 |          1        0.01       99.39
   19930228 |          1        0.01       99.40
   19930415 |          1        0.01       99.41
   19940106 |          1        0.01       99.42
   19940623 |          1        0.01       99.43
   19940901 |          1        0.01       99.44
   19940930 |          1        0.01       99.45
   19950131 |          1        0.01       99.46
   19950301 |          1        0.01       99.47
   19950401 |          1        0.01       99.48
   19950630 |          1        0.01       99.49
   19950831 |          1        0.01       99.50
   19951231 |          1        0.01       99.51
   19960101 |          1        0.01       99.52
   19960131 |          2        0.02       99.54
   19960301 |          1        0.01       99.55
   19960308 |          1        0.01       99.56
   19960630 |          2        0.02       99.58
   19960701 |          1        0.01       99.59
   19961001 |          2        0.02       99.61
   19961231 |          1        0.01       99.62
   19970117 |          1        0.01       99.63
   19970617 |          1        0.01       99.64
   19970701 |          2        0.02       99.66
   19971101 |          1        0.01       99.67
   19971231 |          2        0.02       99.69
   19980520 |          1        0.01       99.70
   19980531 |          1        0.01       99.71
   19980622 |          1        0.01       99.72
   19980630 |          1        0.01       99.73
   19980701 |          1        0.01       99.74
   19980808 |          1        0.01       99.75
   19980910 |          1        0.01       99.76
   19981001 |          1        0.01       99.77
   19981002 |          1        0.01       99.78
   19981116 |          1        0.01       99.79
   19990118 |          1        0.01       99.80
   19990215 |          1        0.01       99.81
   19990501 |          1        0.01       99.82
   19990504 |          1        0.01       99.83
   19990601 |          1        0.01       99.84
   19990701 |          1        0.01       99.85
   19990813 |          1        0.01       99.86
   19990820 |          1        0.01       99.87
   19990930 |          2        0.02       99.89
   19991001 |          2        0.02       99.91
   19991031 |          1        0.01       99.92
   19991201 |          1        0.01       99.93
   19991219 |          1        0.01       99.94
   19991231 |          1        0.01       99.95
   20000201 |          1        0.01       99.96
   20000630 |          1        0.01       99.97
   20000815 |          1        0.01       99.98
   20000831 |          1        0.01       99.99
   20001106 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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