Frequencies for icddate variable in icd2hccxw2005 dataset :

  Diagnosis |
       Code |
  Effective |
       Date |      Freq.     Percent        Cum.
------------+-----------------------------------
  01jan1991 |      4,852       88.12       88.12
  01oct1997 |         11        0.20       88.32
  01oct1998 |         39        0.71       89.03
  01oct1999 |         26        0.47       89.50
  01jan2001 |         18        0.33       89.83
  01oct2001 |         21        0.38       90.21
  01oct2002 |         53        0.96       91.17
  01oct2003 |         36        0.65       91.83
  01oct2004 |         37        0.67       92.50
  01oct2005 |         46        0.84       93.33
  01oct2006 |         96        1.74       95.08
  01oct2007 |         75        1.36       96.44
  01oct2008 |        158        2.87       99.31
  01oct2009 |         38        0.69      100.00
------------+-----------------------------------
      Total |      5,506      100.00

by Jean Roth , jroth@nber.org , 12 Jan 2016