Derivation
variable: illtoest1 [decade estimate of ill house stop] (table[s]: tb_tbxto2007)
variable: illtomm1 [month of ill house stop] (table[s]: tb_tbx, tb_tbxto2007)
variable: illtoyear1 [year of ill house stop] (table[s]: tb_tbx, tb_tbxto2007)
variable: illtodate1 [date of ill house stop] (table[s]: tb_tbxto2007)
recode illtomm1 0=.
replace illtoyear1=1895 if illtoest1==1
replace illtoyear1=1905 if illtoest1==2
replace illtoyear1=1915 if illtoest1==3
replace illtoyear1=1925 if illtoest1==4
replace illtoyear1=1935 if illtoest1==5
replace illtoyear1=1945 if illtoest1==6
replace illtoyear1=1955 if illtoest1==7
replace illtoyear1=1965 if illtoest1==8
replace illtoyear1=1975 if illtoest1==9
replace illtoyear1=1985 if illtoest1==10
replace illtoyear1=1995 if illtoest1==11
replace illtoyear1=1895 if illtoest1==12
replace illtoyear1=1907 if illtoest1==13
replace illtoyear1=1924 if illtoest1==14
replace illtoyear1=1940 if illtoest1==15
replace illtoyear1=1951 if illtoest1==16
replace illtoyear1=1960 if illtoest1==17
replace illtoyear1=1970 if illtoest1==18
recode illtoyear1 9999=. 0=.
replace illtodate1=mdy(illtomm1,15,illtoyear1) if illtomm1~=. & illtoyear1~=.
replace illtodate1=mdy(6,15,illtoyear1) if illtomm1==. & illtoyear1~=.
