376 



TIMBER RESOURCES FOR AMERICA'S FUTURE 



50 



40 



§ 30 



(•1 

 O 



LU 



20 



10 











1954 ^^ 















1950^ 



J J 











A 



40 















/ 











Z 



^^ 1 7oU 



















1900/^ 















1890^^ 



















/ 































2 



40 



6 







80 



100 



120 



POPULATION AGE 20 AND OLDER (MILLION) 



SOURCE: Census of Population, Bureau of the Census estimate for 1954 and 1955. 



Figure 114 



The item "nonseasonal, not dilapidated, for sale or 

 rent" includes what may be called the "active 

 vacancy." It was probably much lower than usual 

 in 1950. The "nonseasonal, dilapidated" units in- 

 clude many on theii- way out of the Nation's 

 housing inventory but not yet demolished or con- 

 verted to nonresidential uses. In 1950, some 43 

 percent of the latter units were on farms, 36 per- 

 cent were classified as rural nonfarm, and 21 per- 

 cent as urban. Many were unoccupied as the 



result of migration from agi"icultural to industrial 

 areas. 



Looking ahead to 1975 and 2000, it seems reason- 

 able to expect that a somewhat larger percentage 

 of families will maintain seasonal summer or 

 winter homes, and that active vacancy will increase 

 considerably above the 1.7 percent that existed in 

 the tight housing situation of 1950. Assuming 

 there will be a dwelling unit for each household to 

 live in, and that unoccupied units of all kinds will 





