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The annual number of indemnity claims for injury-years 1984 through 2001 is tabulated from the Department of Labor and Industry (DLI) claims database. As with insurance data, the number of indemnity claims for any given injury year in the department data increases or "develops" over time, because for some claims it may take months or even years for the department to receive data, particularly payment data, to identify the claim as an indemnity claim. The annual number of medical-only claims is estimated by applying the ratio of medical-only to indemnity claims for insured employers to the total number of indemnity claims. (This assumes the ratio is the same for insured and self-insured employers.) The Minnesota Workers' Compensation Insurers Association, through special tabulations, provides this ratio by injury year for compatibility with the injury-year indemnity claims numbers.