Nov. 27 (UPI) -- South Korea's birth rate showed its largest monthly gain in nearly 14 years, its statistics agency said Wednesday, offering a rare positive sign amid longstanding demographic concerns over a shrinking and rapidly aging population. Some 20,590 babies were born in September, according to data from Statistics Korea, up 1,884 newborns -- or 10.1% -- from the same period last year. The on-year increase was the largest since January 2011. Advertisement September marked the third