Frequencies for contractid variable in mmp2019 dataset :

Contract ID |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.29        0.29
      H0022 |         12        3.50        3.79
      H0137 |         10        2.92        6.71
      H0148 |          2        0.58        7.29
      H0192 |          2        0.58        7.87
      H0281 |          6        1.75        9.62
      H0336 |          6        1.75       11.37
      H0480 |          8        2.33       13.70
      H0927 |          6        1.75       15.45
      H1723 |         35       10.20       25.66
      H1977 |         15        4.37       30.03
      H2506 |          5        1.46       31.49
      H2531 |         12        3.50       34.99
      H2533 |         29        8.45       43.44
      H3018 |          5        1.46       44.90
      H3237 |          2        0.58       45.48
      H5172 |          1        0.29       45.77
      H5280 |         13        3.79       49.56
      H5355 |          2        0.58       50.15
      H5441 |          7        2.04       52.19
      H6080 |          4        1.17       53.35
      H6229 |          2        0.58       53.94
      H6435 |          7        2.04       55.98
      H6870 |          3        0.87       56.85
      H7172 |         14        4.08       60.93
      H7419 |          3        0.87       61.81
      H7833 |          1        0.29       62.10
      H7844 |          2        0.58       62.68
      H7885 |          1        0.29       62.97
      H7890 |          1        0.29       63.27
      H8016 |          1        0.29       63.56
      H8026 |         10        2.92       66.47
      H8029 |          6        1.75       68.22
      H8046 |         15        4.37       72.59
      H8197 |          5        1.46       74.05
      H8213 |         39       11.37       85.42
      H8258 |          1        0.29       85.71
      H8423 |          1        0.29       86.01
      H8452 |         12        3.50       89.50
      H8490 |          6        1.75       91.25
      H8677 |          4        1.17       92.42
      H8786 |          4        1.17       93.59
      H8851 |          4        1.17       94.75
      H9487 |          2        0.58       95.34
      H9576 |          5        1.46       96.79
      H9712 |          2        0.58       97.38
      H9869 |          9        2.62      100.00
------------+-----------------------------------
      Total |        343      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019