If the sale of anti-depression drugs remains constant across the years in country Y, it suggests that there is no significant increase in the demand for such drugs during and after the elections. The conclusion in the passage is based on the premise that the election is a psychologically traumatizing event, leading to increased searches related to depression. In summary, option E weakens the conclusion by providing evidence that contradicts the expected increase in the demand for anti-depression drugs during and after the elections in country Y .