Frequencies for first 10,000 rows of planid variable in rate2018 dataset :

       Plan ID |      Freq.     Percent        Cum.
---------------+-----------------------------------
21989AK0030001 |        153        1.53        1.53
21989AK0050001 |        102        1.02        2.55
21989AK0050002 |        102        1.02        3.57
21989AK0070001 |        102        1.02        4.59
21989AK0080001 |         12        0.12        4.71
21989AK0080002 |         12        0.12        4.83
21989AK0080003 |         12        0.12        4.95
21989AK0090001 |        612        6.12       11.07
21989AK0090002 |        612        6.12       17.19
21989AK0090003 |         12        0.12       17.31
21989AK0100001 |          8        0.08       17.39
21989AK0100002 |          8        0.08       17.47
21989AK0100003 |          8        0.08       17.55
21989AK0110001 |         12        0.12       17.67
21989AK0130001 |         12        0.12       17.79
21989AK0130002 |         12        0.12       17.91
21989AK0140001 |         12        0.12       18.03
21989AK0140002 |         12        0.12       18.15
21989AK0150001 |         12        0.12       18.27
21989AK0150002 |         12        0.12       18.39
21989AK0160001 |          8        0.08       18.47
21989AK0160002 |          8        0.08       18.55
38344AK0540003 |        153        1.53       20.08
38344AK0540006 |        153        1.53       21.61
38344AK0540008 |        153        1.53       23.14
38344AK0540009 |        153        1.53       24.67
38344AK0540010 |        153        1.53       26.20
73836AK0700001 |        612        6.12       32.32
73836AK0700002 |        612        6.12       38.44
73836AK0700003 |        612        6.12       44.56
73836AK0700004 |        612        6.12       50.68
73836AK0700006 |        612        6.12       56.80
73836AK0700007 |        612        6.12       62.92
73836AK0700008 |        612        6.12       69.04
73836AK0700009 |        612        6.12       75.16
73836AK0710002 |        612        6.12       81.28
73836AK0710003 |        612        6.12       87.40
73836AK0710004 |        612        6.12       93.52
73836AK0710006 |        612        6.12       99.64
73836AK0710007 |         36        0.36      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 23 May 2018