When summarizing my data in stata, there are values for inctot such as 9,999,997; 9,999,996; 9,999,991; etc. that are much higher than the actual values should be.
Top Codes represent, where applicable, a determination that some high values of total income were too sparse and specific to be recorded as they were reported without the possibility of identifying the respondents. As a result, numerous high value cases are grouped together under one particular high value to protect respondent anonymity.