By 1978, the rail share of intercity freight had fallen to 35%. Between 1970 and 1979, the rail industry's return on investment never exceeded 2.9% and averaged just 2.0%. The rate of return had been falling for decades: it averaged 4.1% in the 1940s, 3.7% in the 1950s, and 2.8% in the 1960s.