GMAT Critical Reasoning (CR) | Re: Box office receipts for independent movies for the first

What I am not understanding is that when the revenue from the first half of this year is already 20% greater than the total revenue of the last year, then why the total revenue generated this year is not greater than 20% of all of the last year's total revenue. According to me, even if the second half of this year doesn't make any profit, the total revenue of this year is still more than last year revenue. Please throw some light on this. Experts.