AUSTIN - Texas' economy continued its strong performance in March, with the labor market achieving record highs in both total jobs and the size of the civilian labor force. Texas added 26,500 positions over the month to reach a total of 14,282,600 nonfarm jobs. The state added 192,100 jobs over the year, bringing the annual nonfarm growth rate to 1.4 percent which outpaced the national growth rate…