\r\nThe finance company will receive a large part of the necessary funds as loans, which will be repaid during the 35-year life of the new trains.\r\nThe finance company would receive an average of \u20ac91m a year from the state of Berlin-Brandenburg to cover depreciation and interest up to 2019. A new funding agreement is planned in 2020 which would eliminate BVG's existing debt of \u20ac800m by 2033 and call for a 7.6% expansion of services. In return, BVG would be expected to cover 55% of its costs from revenue.\r\nBVG wants to start purchasing new trains and trams next year with a view to receiving the first new vehicles in 2020. Small-profile trains used on U-Bahn lines 1 to 4 have an average age of 24 years, while large-profile trains on lines 5 to 9 are two years older on average.\r\nReplacement of old vehicles will cost an estimated \u20ac2.3bn, leaving \u20ac800m for investment in fleet expansion to cope with Berlin's growing population and increasing numbers of tourists.\r\nThe breakdown of investment in new rail vehicles comprises \u20ac1.6bn for large-profile trains, \u20ac720m for small-profile trains, and \u20ac660m for trams. A further \u20ac131m will spent on rolling stock refurbishment.