Since 1992, the UPU has pursued zero real growth budgeting, maintaining its annual budget increases at or below the level of inflation. The 1996 budget was set at 35 million Swiss francs, where, as of 2002, it remained. The UPU's budget expenses are financed jointly by member countries, based on a contribution class system. Upon admission to the UPU, new member countries are free to choose one of ten contribution classes ranging from one to 50 units. An additional contribution class of one-half unit is reserved for the least developed countries. There are at present five countries with the maximum of 50 contribution units.