Mitte	Δ Rent cost of apartments (yearly)**	Inflation rate (yearly)*
2018	12.50	Base year	Base year
2019	13.42	7.4%	1.54%
2020	13.87	3.4%	− 0.28%
2021	13.91	0.3%	5.30%
2022	15.19	9.2%	8.57%

* The index employed to calculate inflation is the DECPI2005 index (Bundesamt). The annual inflation rate is calculated on an annual basis (31/12/year “t-1”—31/12/year “t”)

** The source of the data on the median rent of newly rented flats in Berlin (2018–2022) is CBRE Group