Frequencies for first 10,000 rows of smsares variable in natl1994 dataset :

PSMA/MSA of |
  Residence |
     (NCHS) |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      3,319       33.19       33.19
        012 |        303        3.03       36.22
        030 |         25        0.25       36.47
        032 |      2,106       21.06       57.53
        063 |         89        0.89       58.42
        072 |        207        2.07       60.49
        077 |        356        3.56       64.05
        094 |        274        2.74       66.79
        101 |          1        0.01       66.80
        129 |        849        8.49       75.29
        154 |          1        0.01       75.30
        183 |          1        0.01       75.31
        184 |      1,066       10.66       85.97
        188 |        919        9.19       95.16
        192 |          1        0.01       95.17
        201 |          1        0.01       95.18
        212 |          4        0.04       95.22
        215 |          1        0.01       95.23
        279 |          1        0.01       95.24
        287 |        361        3.61       98.85
        299 |          1        0.01       98.86
        309 |          1        0.01       98.87
        999 |        111        1.11       99.98
        ZZZ |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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