Figure 2-195. Number of cases of dust diseases of the lungs in private industry, 1972-2001. During 1972-2001, the number of BLS-estimated dust diseases of the lungs ranged from a low of approximately 1,000 cases in 1975 to a high of 3,500 cases in 1996. BLS reported 1,300 cases in 2001. (Source: BLS [2002].)