It was only after the Second World War that the Society's concerns about the cost of its journals were finally allayed. There had been a one-off surplus in 1932, but it was only from 1948 that the "Transactions" began regularly to end the year in surplus. That year, despite a three-fold increase in production costs (it was a bumper year for papers), there was a surplus of almost £400. Part of the post-war financial success of the "Transactions" was due to the rising subscriptions received, and a growing number of subscriptions from British and international institutions, including universities, industry, and government; this was at the same time as private subscriptions, outside of fellows, were non-existent. By the early 1970s, institutional subscription was the main channel of income from publication sales for the society. In 1970–1971, 43,760 copies of "Transactions" were sold, of which casual purchasers accounted for only 2070 copies.