As is shown by the percentage in the picture X has been on rise/ decrease, X dramatically decreasing from X in X to X in X. From the sharp decline in the chart, it goes without saying that X.
There are at least two good reasons accounting for X . In one hand, X .In the other hand, X is due to the fact that X .In addition, X is responsible for X . Maybe there are some other reasons to show X .But itis generally believed that the above mentioned reasons are commonly convincing.
As far as I am concerned, I hold the point of view that X . I am sure my opinion is both sound and well-grounded.