context: The monetary system of the Russian Empire (1885-1896) consisted of the main currency — the paper [1] ruble, and the auxiliary currency — the metal gold ruble; the mutual exchange rate of these two currencies was determined by the market. The use of gold currency was allowed only in foreign trade. Formally, a paper ruble was called a credit ticket (that is, a banknote exchanged for a hard currency) and was considered silver, and its exchange rate for gold was fixed, that is, the monetary system was legally bimetallic. In reality, the state did not exchange the credit ruble for gold or silver, and full-weight silver coins went out of circulation. The paper ruble was supplemented by an auxiliary non-equilibrium silver coin and a copper coin. The system began to operate in 1885, from the moment of a small devaluation of the gold ruble, and ceased to function in 1897, after its transformation into a monometallic gold monetary system.
question: Since what year did the monetary system begin to operate in Russia?
answers.text: 1885