_dta:
  1.  countyrate1991 set up by Jean Roth , jroth@nber.org , 19 Dec 2016
  2.  Source Page: https://www.cms.gov/Medicare/Health-Plans/MedicareAdvtgSpecRateStats/Ratebooks-and-Supporting-Data.html
  3.  Source File URL: www.cms.gov/Medicare/Health-Plans/MedicareAdvtgSpecRateStats/Downloads/ratebook.zip

  obs:         3,246                          
 vars:            12                          19 Dec 2016 16:01
 size:       253,188                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
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fipsstco        str5    %9s                   
stabbr          str2    %9s                   State 2-Character Abbreviation
countyname      str20   %20s                  County
aaged           float   %9.0g                 Aged Part A
baged           float   %9.0g                 Aged Part B
adisab          float   %9.0g                 Disabled Part A
bdisab          float   %9.0g                 Disabled Part B
aesrd           float   %9.0g                 ESRD Part A
besrd           float   %9.0g                 ESRD Part B
ssacounty       str5    %9s                   SSA County Code
state           str20   %20s                  State Name
year            int     %9.0g                 Year
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sorted by: ssacounty