I am not sure of the species of tree I selected, but it is typical conifer of Northern hemisphere.
I trimmed all the branches off the tree, counted them, weighed them, recorded results, then ranked the branches from lightest to heaviest; completed a cumulative percentage rank of weight and count table, and finally graphed the results.
I found that there were 5 levels of branches.
I will be honest with you, I did not continue counting and weighing the branches in detail after the 3 level - the time cost was just so high and it would not change the shape as they were so light. So, I counted and averaged the final 2 levels (sorry, things to do).