key words are is ‘has been changed’ which means prior to teh change you had to deal with the existing options. In the absence of the option of Indian, the best otion for you to check is caucasian based on a number of items including US supreme court rulings.
or are you suggesting this be applied retroactively.
oh, and btw, this list is not being used consistently for all federal and state documents even as of today. so census is one thing, but what are you going to check on your driver’s license when that option does not exist.
for example, this is the link to naturalization form from USCIS which is being used right now..