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  2. National identification number - Wikipedia

    en.wikipedia.org/wiki/National_identification_number

    The form is YYXXDD/SSSC, where XX=MM (month of birth) for male (numbers 01–12) and XX=MM+50 for female (numbers 51–62), SSS is a serial number separating persons born on the same date and C is a check digit, but for people born before 1 January 1954 the form is without the check digit - YYXXDD/SSS.