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Table 4.

Table of actual and calculated values of the function and calculation errors

Year Actual demand for products (tons) Estimated demand for products (tons) Calculation error, %
2005 251356 268574.89 6,8504
2013 410400 42731.76 4,1208
2014 497250 523119.92 5,2026
2015 531424,8 564399,17 6,2049
2017 690525 737490,36 6,8014
2018 6853437 707603,66 7.3317
2019 731952 755725,8 3,2480
2020 810652 859990,71 6.0863
Average error 5.73308

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