In the 1st quarter, the rental cost index rose by 5.86%, based on the previous 12 months, according to a study published by the DLR federation, in conjunction with NEO Engineering. This increase is due to a number of factors: a rise in business credit rates, leading to a 42.5% increase in financial expenses; a rise in depreciation and amortization, which has a significant influence on this increase; a rise in personnel expenses (+3.89%), which also plays an important role; and finally, the commercial rents index, which is up by 5.6%.