APPENDIX 



293 



IMPEDIMENTS TO RECREATION FOR THE ILL-TO-DO 



TABLE D. Distribution of income units (families and single individuals} in the continental United 



States, by annual income level, 1935-36 



TABLE E. Amount and percent of population of continental United States in six zones according to the 

 cost of a round trip to the nearest national forest for a group of four, based on 1930 census 



TABLE F. Relation of percentage of entire United States population to percentage of national-forest 



campers in each income class 



1 Based on figures in Consumers' Incomes in the United States; Their Distributions in 1935-36. 



2 Based on 25,486 filled-out questionnaires to heads of families or independent individuals. 



