What do kids on the autism spectrum do after they graduate high school? For most of them, nothing. According to a 2012 study published in the journal Pediatrics, more than 50 percent of people on the autism spectrum who left high school in the previous two years weren't going to college and they weren't in the workforce. Next week, George Washington University's Milken Institute School of Public Health is hosting a conference to address, in part, how individuals with autism can better transition…