I installed a set of of 4 tires on my 06 sedan. I put about 2500 miles on them and the rears are border line passing state inspection. I taught these tires were supposed to last 30k. I guess these tires are very soft compound. My front tires are good.

 

although i don't have or never had experience with your yokos, i would have to guess your alignment is off.... my tires (stock goodyear nct5 with 40k miles... mind you i had ran on another set of 19" wheels and tires for 20k miles) have even wear all around as i rotate them every 5k miles... even before the rotation the tires would actually wear more on the inside.... yours seem to wear outside in despite being the rear tires suggest improper alignment so may want to get that checked... i could be wrong though since you have aftermarket camber kit.