425 0 400 % Total number of packinghouses 375 - 350 325 \ \W 300. 275 0 0 225 \ Average volume per house (1000 4/5-boxes) \ 200 \ o 150- 0 1938-39 1943-44 1948-49 1953-54 1958-59 1963-64 1968-69 1973-74 Season Figure 4. Certified fresh citrus shippers in Florida by volume at 5-year intervals, 1938-39 through 1975-76 seasons. Source: Florida Division of Fruit and Vegetable Inspection [7].