Frequencies for first 10,000 rows of chow_prior_dt variable in pos1992 dataset :

      prior |
  admission |
 suspension |
       date |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,992       99.92       99.92
     850531 |          1        0.01       99.93
     860430 |          1        0.01       99.94
     860530 |          1        0.01       99.95
     910730 |          2        0.02       99.97
     910921 |          1        0.01       99.98
     911031 |          1        0.01       99.99
     920131 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017