Frequencies for countyfips variable in countyak2005 dataset :

    3-digit |
County FIPS |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |          1        3.57        3.57
        013 |          1        3.57        7.14
        016 |          1        3.57       10.71
        020 |          1        3.57       14.29
        050 |          1        3.57       17.86
        060 |          1        3.57       21.43
        068 |          1        3.57       25.00
        070 |          1        3.57       28.57
        090 |          1        3.57       32.14
        100 |          1        3.57       35.71
        110 |          1        3.57       39.29
        122 |          1        3.57       42.86
        130 |          1        3.57       46.43
        150 |          1        3.57       50.00
        164 |          1        3.57       53.57
        170 |          1        3.57       57.14
        180 |          1        3.57       60.71
        185 |          1        3.57       64.29
        188 |          1        3.57       67.86
        201 |          1        3.57       71.43
        220 |          1        3.57       75.00
        232 |          1        3.57       78.57
        240 |          1        3.57       82.14
        261 |          1        3.57       85.71
        270 |          1        3.57       89.29
        280 |          1        3.57       92.86
        282 |          1        3.57       96.43
        290 |          1        3.57      100.00
------------+-----------------------------------
      Total |         28      100.00

by Jean Roth , jroth@nber.org , 26 Jun 2017