SRL for [cut]: Shippers [cut] about $ 35 billion from their annual , inter - city truck and rail costs , to about $ 150 billion , or about 6.4 % of gross national product , down from 8 % of GNP in 1981 .
ARG-0: Shippers | ARG-2: about $ 35 billion | ARG-1: from their annual , inter - city truck and rail costs | ARG-4: to about $ 150 billion , or about 6.4 % of gross national product , down from 8 % of GNP in 1981