Frequencies for first 10,000 rows of smsares variable in natl1979 dataset :

   Standard |
Metropolita |
          n |
Statistical |
  Area SMSA |
         of |
  residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      5,331       53.31       53.31
        003 |          1        0.01       53.32
        008 |          1        0.01       53.33
        014 |          1        0.01       53.34
        026 |      1,777       17.77       71.11
        037 |          1        0.01       71.12
        048 |         67        0.67       71.79
        068 |          1        0.01       71.80
        074 |        307        3.07       74.87
        089 |        563        5.63       80.50
        097 |          1        0.01       80.51
        124 |          1        0.01       80.52
        128 |      1,069       10.69       91.21
        131 |        622        6.22       97.43
        145 |          1        0.01       97.44
        149 |         10        0.10       97.54
        171 |          1        0.01       97.55
        202 |          1        0.01       97.56
        212 |        242        2.42       99.98
        220 |          1        0.01       99.99
        ZZZ |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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