R - VariableID changes

I'm working on R, trying to get Census data such as Total households, marriages (same/opposite sex), etc. I noticed some of the variable IDs changes depending on the year. I can't find anywhere the reason behind it or how to navigate through this "issue". So far finding the variable ID for the different types of marriages/cohabiting has been the most challenging. Does any ones has any suggestions?

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  • For example: Using ACS1,Year 2019 for Married Couple Households, Opposite-sex the variableID is B11009_003, but not the same for the years before (2018, 2017, 2016, etc..). Any suggestions how to find the variable ID for the years before 2019?

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  • For example: Using ACS1,Year 2019 for Married Couple Households, Opposite-sex the variableID is B11009_003, but not the same for the years before (2018, 2017, 2016, etc..). Any suggestions how to find the variable ID for the years before 2019?

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