Frequencies for first 10,000 rows of smsares variable in natlterr2002 dataset :

PSMA/MSA of |
  Residence |
     (NCHS) |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      1,577       15.77       15.77
        001 |        357        3.57       19.34
        002 |        469        4.69       24.03
        003 |        844        8.44       32.47
        004 |        564        5.64       38.11
        005 |        990        9.90       48.01
        006 |      5,185       51.85       99.86
        999 |          4        0.04       99.90
        ZZZ |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015