Fig. 1

The proportions observed for the different categories of age, as well as the proportions predicted for the different models. The ML estimates for the parameters of the 4 competing distributions were Gamma: Shape = 1.0305 and rate = 0.0869, Weibull: Shape = 1.007 and scale = 11.8898, Exponential: rate = 0.0844, Log-normal: mean = 1.9144 and standard deviation = 1.1995. *The line of the models overlap in some regions and the difference are difficult to see. The bar graphs are the empirical (actual) data, corresponding to the overall distribution of all age groups described above