I used the function “Analyze data online” to get population counts for Indonesia by regency. For many regencies, data for 1995 is missing (and thus indicated as “0”). I am aware that “0” does not necessarily mean “missing” all the time: It can also mean that at the respective census round, the regency did not exist yet (as it split off another regency at some point after that census year). However, this is not the answer/solution to the problem for the 1995 census round: This data simply appears to be missing, as data is available for the 1990 census round. I hope I expressed myself clearly, and hope you have the answer.