15 Other provisions (XLS:) Download millions of € Provisions for termination benefits Other provisions for personnel costs Provisions for resto¡ration obligations Provisions for litigation risks Provisions for sales and procurement support Miscellaneous other provisions Total AT DECEMBER 31, 2016 197 2,554 1,652 328 423 1,234 6,388 Of which: current 178 1,472 51 318 423 626 3,068 Changes in the composition of the Group 0 1 0 0 0 1 2 Currency translation adjustments 0 (59) (65) (2) (25) (44) (195) Addition 41 1,911 121 86 754 432 3,345 Use (54) (1,520) (57) (69) (423) (390) (2,513) Reversal (17) (121) (68) (17) (23) (163) (409) Interest effect 0 0 22 0 0 11 33 Other changes 0 (109) (15) 0 0 0 (124) AT DECEMBER 31, 2017 166 2,657 1,591 326 706 1,080 6,527 Of which: current 166 1,481 40 311 706 668 3,372 Transfer resulting from change in accounting standards 0 0 0 0 (46) (22) (68) Changes in the composition of the Group 1 4 10 1 0 7 24 Currency translation adjustments 0 15 22 2 4 10 54 Addition 125 1,922 113 129 268 337 2,894 Use (35) (1,482) (30) (27) (479) (366) (2,419) Reversal (3) (74) (101) (144) (4) (177) (503) Interest effect 0 28 (16) 0 0 (2) 9 Other changes 0 (61) (24) 1 6 (5) (82) AT DECEMBER 31, 2018 255 3,010 1,564 289 456 862 6,435 Of which: current 168 1,662 35 266 456 557 3,144 In the measurement of the other provisions, Deutsche Telekom is exposed to interest rate fluctuations, which is why the effect of a possible change in the interest rate on the principal non-current provisions was simulated. The other, non-staff-related provisions are discounted using maturity-related discount rates specific for the respective currency area. To this end, Deutsche Telekom determines discount rates with maturities of up to 30 years. In 2018, the discount rates ranged from 0.06 to 3.08 percent (2017: from 0.00 to 3.08 percent) in the euro currency area and from 3.87 to 6.21 percent (2017: from 2.42 to 4.96 percent) in the U.S. dollar currency area. If the discount rate were increased by 50 basis points with no other change in the assumptions, the present value of the principal other non-current provisions would decrease by EUR 102.7 million (December 31, 2017: EUR 103.1 million). If the discount rate were decreased by 50 basis points with no other change in the assumptions, the present value of the principal other non-current provisions would increase by EUR 107.3 million (December 31, 2017: EUR 111.6 million). Provisions for termination benefits and other personnel provisions include provisions for staff restructuring. These provisions developed as follows in the 2018 financial year: (XLS:) Download millions of € Jan. 1, 2018 Addition Use Reversal Other changes Dec. 31, 2018 Severance and voluntary redundancy models 167 125 (35) (3) 0 255 Phased retirement 489 534 (360) 0 (55) 608 656 659 (395) (3) (55) 863 Of which: current 316 352 Other provisions for personnel costs include provisions for deferred compensation and allowances, as well as for anniversary gifts. Provisions for restoration obligations include the estimated costs for dismantling and removing an asset, and restoring the site on which it is located. The estimated costs are included in the costs of the relevant asset. The provisions for litigation risks primarily relate to possible settlements attributable to pending lawsuits. For further information, please refer to Note 36 “Contingencies”. Provisions for sales and procurement support are recognized for dealer commissions, subsidies for advertising expenses, and reimbursements. Miscellaneous other provisions include a large number of low-value individual items, such as provisions related to executory contracts, the disposal of businesses and site closures, in particular in prior financial years, as well as warranty and environmental damage provisions.