How much longer until i have to replace the battery for my macbook pro?

Well i got my macbook pro 29 weeks ago i have 69 load cycles? i use my laptop like all day when i dont have school and all the time after school unless i have something to do. Im not sure how i recharge it, i sometimes recharge it when its very close to dying, and other times i recharge it even though its only down by 25 percent is this bad? At this rate that im using my laptop and with 69 load cycles how much longer do i have before i have to replace the battery for my macbook pro?