At a work place, statistics of accidents have been calculated for a period of 10 years...

At a work place, statistics of accidents have been calculated for a period of 10 years, and the results are shown in the following table. It is assumed that there are 500 employees working 2000 hours per year the whole period. Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 2 62 80 Number of LTIS 12 6 9 7 10 5 4 Number of LWDs 65 42 90 55 75 50 Calculate LTIF. and LWF. for each year and plot the numbers in two curves. What do the curves tell us about the severity of the LTIS?