Now it's official: Toyota is once again the world's top automaker. Toyota Motor Corp. released its tally for global vehicle sales for last year Monday at 9.748 million vehicles, a bigger number than the estimate it gave last month at about 9.7 million vehicles. It was already clear Toyota had dethroned General Motors Co. as the Detroit-based automaker fell short, selling 9.29 million vehicles. GM had been the top-selling automaker for more than seven decades before losing the title to Toyota in 2008. GM retook the sales crown in 2011, when Toyota's production was hurt by the quake and tsunami in northeastern Japan.