I’ve selected 36 variables and 2 samples (Mar 2011 and 2012). I am interested in selecting cases along the CITIZEN variable, so that the data will only reflect persons who are naturalized citizens (CITIZEN=2) and persons who are not citizens (CITIZEN=3). However when I click on “Select Cases” to choose cases fitting the mentioned criteria, CITIZEN does not come up as an option. Other variables do such as AGE, EMPSTAT, but not CITIZEN. How do I go about selecting only those cases that are CITIZEN=2 and 3?