Depreciation on residential real property used as a rental on different occasions

I bought my home in 1999. Lived in it until 2001 when I rented it. Moved back in on 2005. Lived in it till 2014 then rented it out. As of this year 2020 it is still being rented. I do not have tax returns for 2001 thru 2004 so I don't know what depreciation was taken. I do have my property tax statements from 2003 till present. I also have tax returns for the rental years 2015 thru 2018.

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