164 



THE OUTLOOK FOR TIMBER IN THE UNITED STATES 



Expenditures for new nonresidential construction 



1967 dollars 

 Relationships 



highways 



■■■■■ 

 ■■■■■ 

 ■I 





300 400 500 600 700 800 900 



Gross national product (billion dollars) 



300 400 500 600 700 800 900 



Gross national product [billion dollars) 



aiiii 



300 400 500 600 700 800 900 



Gross national product (billion dollars) 



Total expenditures 



highways 



1970 1980 1990 2000 



1945 1950 1960 1970 1980 1990 2000 



1970 1980 1990 2000 



Figure 63 — Continued 



