Frequencies for first 10,000 rows of importdate variable in bencs2014 dataset :

        Import Date |      Freq.     Percent        Cum.
--------------------+-----------------------------------
2013-06-04 08:25:28 |         36        0.36        0.36
2013-06-06 10:50:48 |         66        0.66        1.02
2013-08-01 12:48:00 |         30        0.30        1.32
2013-09-02 11:39:25 |        224        2.24        3.56
2013-09-10 14:43:20 |        234        2.34        5.90
2014-01-17 09:36:20 |        271        2.71        8.61
2014-01-21 08:29:49 |      3,447       34.47       43.08
2014-03-19 07:06:49 |         54        0.54       43.62
2014-04-18 11:49:29 |      5,638       56.38      100.00
--------------------+-----------------------------------
              Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 6 Oct 2016