financial overview management s discussion and analysis the following should be read in conjunction with consolidated statements related notes included elsewhere this annual report includes forward looking that involve risks uncertainties actual results could differ materially from those anticipated as a result of numerous factors including certain discussed later section for reporting purposes tatneft converts metric tonnes crude oil to barrels using conversion factor 7 123 represents blend varying specific each its fields because proportion production by field varies period total reserves volumes company converted blended rate may calculated on basis all rouble amounts are expressed constant roubles december 31 2002 purchasing power except indicated otherwise background oao subsidiaries jointly referred group or is one largest vertically integrated companies russia terms