Frequencies for first 10,000 rows of mbcntry variable in natlterr2012 dataset :

   Mother's |
      Birth |
Country U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
         AR |          4        0.04        0.04
         AV |          1        0.01        0.05
         BG |          2        0.02        0.07
         BM |          1        0.01        0.08
         BU |          1        0.01        0.09
         CA |          3        0.03        0.12
         CH |        387        3.87        3.99
         CO |          5        0.05        4.04
         CU |          3        0.03        4.07
         DA |          1        0.01        4.08
         DM |          1        0.01        4.09
         DR |        105        1.05        5.14
         EC |          1        0.01        5.15
         ET |          1        0.01        5.16
         FJ |          1        0.01        5.17
         FM |        800        8.00       13.17
         FR |          1        0.01       13.18
         GE |          4        0.04       13.22
         GM |         18        0.18       13.40
         GY |          1        0.01       13.41
         HK |          3        0.03       13.44
         ID |          2        0.02       13.46
         IN |          6        0.06       13.52
         IT |          3        0.03       13.55
         JA |         52        0.52       14.07
         JM |          2        0.02       14.09
         KS |        136        1.36       15.45
         LY |          1        0.01       15.46
         MT |          1        0.01       15.47
         MX |         10        0.10       15.57
         NP |          1        0.01       15.58
         NU |          2        0.02       15.60
         PE |          1        0.01       15.61
         PL |          1        0.01       15.62
         PM |          1        0.01       15.63
         PS |         40        0.40       16.03
         RM |          6        0.06       16.09
         RO |          1        0.01       16.10
         RP |        607        6.07       22.17
         RS |          3        0.03       22.20
         SA |          2        0.02       22.22
         SC |          2        0.02       22.24
         SG |          1        0.01       22.25
         SP |          5        0.05       22.30
         TH |          6        0.06       22.36
         TU |          1        0.01       22.37
         TW |          8        0.08       22.45
         UK |          1        0.01       22.46
         US |      7,105       71.05       93.51
         UY |          1        0.01       93.52
         VC |          1        0.01       93.53
         VE |          8        0.08       93.61
         VI |          3        0.03       93.64
         VM |          3        0.03       93.67
         VS |          3        0.03       93.70
         VT |          1        0.01       93.71
         YY |        569        5.69       99.40
         ZZ |         60        0.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016