Frequencies for last_rpt_sw variable in hcris2552_10_2012 dataset :

last report |
     switch |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      6,173       99.13       99.13
          X |         18        0.29       99.42
          Y |         36        0.58      100.00
------------+-----------------------------------
      Total |      6,227      100.00

by Jean Roth , jroth@nber.org , 23 Aug 2018