The influx of New World grain caused a slump in grain prices, forcing the peasants to farm more land. At the same time, despite their efficiency, large peasant households split up (from 9.5 to 6.8 persons per household in central Russia, 1861–1884). The resulting land hunger increased prices 7-fold and made it easier for nobles to sell or rent land rather than farm it themselves. From 1861 to 1900 40% of noble land was sold to peasants (70% of this went to the Commune and by 1900 two thirds of the nobles' arable land was rented to the peasantry. 1900–1914, over 20% of remaining noble land was sold but only 3% of the 155 estates over 50,000 "destiny". According to the 1897 census, 71% of the top 4 ranks of the civil service were nobles. But in the civil service as a whole, noble membership declined from 49.8% in 1755 to 43.7% in the 1850s and to 30.7% in 1897. There were 1.2 million nobles, about 1% of the population (8% in Poland; compare with 4% in Hungary and 1 to 1.5% in France). Their military influence waned: in the Crimean War 90% of officers were noble, by 1913 the proportion had sunk to 50%. They lived increasingly away from their estates: in 1858 only 15 to 20% of Russian nobles lived in cities, by 1897 it was 47.2%.