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IMRDTPY4
Record date of fourth DTP shot: Year

Codes and Frequencies



An 'X' indicates the category is available for that sample

0000NIUXXXXXXXXXXXXX
19841984·············
19851985·············
19861986···········XX
19871987··········XXX
19881988··········XXX
19891989········XXXXX
19901990······X·XXXXX
19911991······XXXXXXX
19921992·····XXXXXXX·
19931993····XXXXXXX··
19941994···XXXXXXX···
19951995··XXXXXXX····
19961996·XXXXXXX·····
19971997XXXXXXX······
19981998XXXXXX·······
19991999XXXXX········
20002000XXXX·········
20012001XXX··········
20022002XXX··········
20032003X············
9997Unknown-refused··XX·········
9998Unknown-not ascertained·X···········
9999Unknown-don't knowXXXXXXXXXXXXX