Frequencies for first 10,000 rows of smsares variable in natl1976 dataset :

   Standard |
Metropolita |
          n |
Statistical |
  Area SMSA |
         of |
  residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      5,345       53.45       53.45
        003 |          1        0.01       53.46
        014 |          2        0.02       53.48
        019 |          1        0.01       53.49
        026 |      1,978       19.78       73.27
        040 |          1        0.01       73.28
        042 |          1        0.01       73.29
        048 |         61        0.61       73.90
        049 |          1        0.01       73.91
        055 |          1        0.01       73.92
        069 |          1        0.01       73.93
        074 |        249        2.49       76.42
        089 |        541        5.41       81.83
        092 |          1        0.01       81.84
        118 |          1        0.01       81.85
        123 |          1        0.01       81.86
        124 |          1        0.01       81.87
        128 |        967        9.67       91.54
        131 |        552        5.52       97.06
        137 |          2        0.02       97.08
        138 |          1        0.01       97.09
        149 |         16        0.16       97.25
        153 |          2        0.02       97.27
        155 |          2        0.02       97.29
        182 |          2        0.02       97.31
        194 |          1        0.01       97.32
        212 |        263        2.63       99.95
        ZZZ |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016