The initial $1 million criterion established in 1911 for a Class I railroad was used until January 1, 1956, when the figure was increased to $3 million. In 1956, the ICC counted 113 Class I line-haul operating railroads (excluding "3 class I companies in systems") and 309 Class II railroads (excluding "3 class II companies in systems"). The Class III category was dropped in 1956 but reinstated in 1978. By 1963, the number of Class I railroads had dropped to 102; cutoffs were increased to $5 million by 1965, to $10 million in 1976 and to $50 million in 1978, at which point only 41 railroads qualified as Class I.