The American Trucking Association reported on March 19, 2013 that the advanced seasonally (SA) adjusted For-Hire Truck Tonnage Index rose 0.6 percent in February, the fourth consecutive month that it has increased. Tonnage gained a total of 7.7 percent over the last four months. The SA index was up 4.2 percent compared to February 2012. Year-to-date, the tonnage index is up 4.4 percent compared with the same period in 2012.