My travel history

I need to document my travel history during the past decade to apply for my visa. I wrote it out last night and it took an hour because I have travelled over 30 times including stop overs and 9 different countries, in particular I visited HongKong 10 times. Also I had to write the reasons, the periods, the destinations. It may be useful for the Embassy to refer to travel histories, but I am doubtful why they need this information.