I want to know the answer to the following question:
The Aboriginal population declined by what estimated percentage by 1863?
All the background I'm provided with is that "With the gold rush largely over by 1860, Melbourne continued to grow on the back of continuing gold mining, as the major port for exporting the agricultural products of Victoria, especially wool, and a developing manufacturing sector protected by high tariffs.". Is that enough to answer the question?
Answer: no